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INSTALL: converted to markdown => INSTALL.md

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DevCpp-Mingw Install & Compilation Sept 2005
==================================
Reference Emails available at curl@haxx.se:
Libcurl Install and Use Issues
Awaiting an Answer for Win 32 Install
res = curl_easy_perform(curl); Error
Makefile Issues
Having previously done a thorough review of what was available that met my
requirements under GPL, I settled for Libcurl as the software of choice for
many reasons not the least of which was the support.
Background
----------
This quest started when I innocently tried to incorporate the libcurl library
into my simple source code. I figured that a few easy steps would accomplish
this without major headaches. I had no idea that I would be facing an almost
insurmountable challenge.
The main problem lies in two areas. First the bulk of support for libcurl
exists for a Unix/linux command line environments. This is of little help when
it comes to Windows O/S.
Secondly the help that does exist for the Windows O/S focused around mingw
through a command line argument environment.
You may ask "Why is this a problem?"
I'm using a Windows O/S with DevCpp. For those of you who are unfamiliar with
DevCpp, it is a window shell GUI that replaces the command line environment
for gcc. A definite improvement that I am unwilling to give up. However using
DevCpp presented its own set of issues. Inadvertently I also made some
careless errors such as compiling the 7.14 version of Makefile with an older
version of source code. Thanks to Dan Fandrich for picking this up.
I did eventually with the help of Daniel, Phillipe and others manage to
implement successfully (the only mingw available version)
curl-7.13.0-win32-ssl-devel-mingw32 into the DevCpp environment. Only the
dynamic libcurl.dll libcurldll.a libraries worked. The static library which I
was interested in did not. Furthermore when I tried to implement one of the
examples included with the curl package (get info.c) it caused the executable
to crash. Tracing the bug I found it in the code and function res =
curl_easy_perform(curl);.
At this point I had to make a choice as to whether invest my limited
time-energy resource to fixing the bug or to compile the new version
available. After searching the archives I found a very similar or the same bug
reported from version 7.12x on. Daniel did inform me that he thought that this
bug had been fixed with the latest version. So I proceeded to compile the
latest SSL version where I faced other challenges.
In order to make this process unremarkable for others using the same
environment I decided to document the process so that others will find it
routine. It would be a shame if newbies could not implement this excellent
package for their use.
I would like to thank the many others in this forum and in the DevCpp forum
for their help. Without your help I may either have given up or it would have
taken me many times longer to achieve success.
The Cookbook Approach
---------------------
This discussion will be confined to a SSL static library compilation and
installation. Limited mention and comments will be inserted where appropriate
to help with non-SSL, dynamic libraries and executables.
Using Makefile from DevCpp to compile Libcurl libraries
Preamble
--------
Using the latest version release - curl-7.14.0.tar.gz. Curl source code is
platform independent. This simply means that the source code can be compiled
for any Operating System (Linux/Unix Windows etc. and variations of thereof).
The first thing to note is that inside curl-7.14.0 you will find two folders
lib and src. Both contain Makefile.m32 (required for win mingw library or exe
compilation) files which are different. The main difference between these two
folders and the makefiles is that the src folder contents are used to compile
an executable file(curl.exe) while the lib folder contents are used to compile
a static (libcurl.a) and dynamic (libcurl.dll & libcurldll.a) file that can be
used to compile libcurl with your own source code so that one can use and
access all libcurl functions.
Before we start please make sure that DevCpp is installed properly. In
particular make sure you have no spaces in the name of any of the directories
and subdirectories where DevCpp is installed. Failure to comply with the
install instructions may produce erratic behaviour in DevCpp. For further info
check the following sites
http://aditsu.freeunixhost.com/dev-cpp-faq.html
https://sourceforge.net/p/dev-cpp/discussion/48211/thread/2a85ea46
As I have mentioned before I will confine this to the SSL Library compilations
but the process is very similar for compilation of the executable - curl.exe;
just substitute the src folder makefile in its stead.
First use a text processor Notepad, or your own favourite text processor. To
engage your favourite text processor, select Makefile.m32 click once with your
mouse on file icon; icon turns blue, press the shift key and right-click on
mouse, menu appears select "Open with", select your favourite text processor.
Next read the contents of Makefile.m32. It includes instructions on its use.
Method I - DOS Command Line
---------------------------
Note - The only reason I have included this method is that Method II which is
the preferred method for compiling does not allow for the setting of option
switches (e.g. SSL = 1 or SSL =0). At least that's what they tell me at the
Dev-Cpp forum.
1 - Make a copy of (D:\Dev-Cpp\bin) bin folder and name it "bin Original"
place it in the Dev-Cpp installed directory (D:\Dev-Cpp\ for this example)
2 - Copy the entire contents of the LIB folder of curl-7.14.0.tar.gz or zip
version into the bin folder above (D:\Dev-Cpp\bin). The reason being is that
the make.exe file resides in this folder. Make.exe will use - Makefile.m32,
Makefile.inc, and the source code included in the lib folder to compile the
source code. There is a PATH issue with make.exe that remains unresolved at
least for me. Unless the entire source code to be compiled is placed entirely
within the directory of make.exe an error message will be generated - "file
xxxx.yyy not available".
3- Go to Dev-Cpp\bin and double click on make .exe. You will see a DOS window
quickly pop up and close very quickly. Not to worry! Please do not skip this
step.
4- Click on the start button\Programs\MS-DOS Prompt.Once the DOS Window is up
Type the disk drive letter (e.g. E: ) engage the enter button. The path should
automatically take you to the directory of the make.exe file.
5- To compile the source code simply type at the DOS prompt make -f
Makefile.m32 as per instructions contained in the Makefile.m32 file (use any
text processor to read instructions). I don't believe that this makefile
allows for the option of non SSL. Ignore any warnings.
6- Collect and make copies of libcurl.a, libcurl.dll, libcurldll.a and any *.o
compilations you might need in another directory outside of the bin directory
as you will need this files shortly to set up libcurl for use with
Dev-cpp. For most apps *.o is not required. Later on we will show what to do
with these files.
7- You are finished but before closing we need to do cleanup - erase the bin
folder and rename the "bin Original" folder created in step 1 to bin.
Note to compile a curl executable the process is probably similar but instead
of using the LIB folder contents use the SRC folder contents and Makefiles in
curl-7.14.0.tar.gz. File directories relative placements must be respected for
compiling to take place successfully. This may not be possible with the PATH
problem that make.exe experiences. If anyone has solved this PATH issue and
please make sure it actually works on Win 9x/2000/XP before letting me
know. Then please let me or Daniel in on the solution so that it can be
included with these instructions. Thanks.
or
Method II - Dev-Cpp GUI
-----------------------
1- Copy the entire contents of the LIB folder of curl-7.14.0.tar.gz or zip
version into any folder outside of (Dev-Cpp\bin).
2- Drop the File/New/click on Project.
3- New Project Dialogue box appears. Double click on the Static Library.
4- Create Project Dialogue box appears. Select the LIB folder location to
place and locate your Project File Name. Placing the Project File Name
elsewhere may cause problems (PATH issue problem again).
5- Drop down the Project/Project Options. Project Options Dialogue box
appears.
6- Select the Makefile tab in the Project Options Dialogue Box. Check Box -
Use Custom Makefile. Click on the Folder icon at the extreme right of the
Check Box. Select Makefile.m32 in the folder wherever you have placed the
contents of the LIB Folder. Press OK and close the Dialogue Box.
7- Drop the Menu Project/Click on Add to Project. Open File Dialogue Box
appears. The Dialogue Box should open in the folder wherever you have placed
the contents of the LIB Folder. If not go there.
8- Select Crtl-A to select all files in the LIB folder. Click on open to add
files and close box. Wait till all files are added. This may take 30 seconds
or longer.
9- Drop the Menu Execute/Click on Compile.
10- That's it.
The following steps must be completed if Curl is to work properly
=================================================================
LIB folder inclusions (*.a placement)
-------------------------------------
1- Refer to Method I - DOS Command Line point # 6 Take libcurl.a, libcurldll.a
and install it in the directory C( or whichever drive Dev is installed)
:\Dev-Cpp\lib.
Include Folder
--------------
1- Create a new folder by the name of curl (do not change the name curl to
some other name as it will cause major issues) in the directory
C:\Dev-Cpp\include.
2- Copy the entire contents of the curl folder of curl-7.14.0.tar.gz or zip
version into the newly created curl directory - C:\Dev-Cpp\include\curl.
Links To Include And Lib Folder
-------------------------------
1- Drop the Menu - Tools\Compiler Options\Directories\Libraries. Make sure
that C( or whichever drive Dev is installed):\DEV-CPP\lib is included.
2- Next select the Menu - Tools\Compiler Options\Directories\C Includes. Make
sure that C:\DEV-CPP\include and C:\Dev-Cpp\include\curl are included.
3- Next select the Menu - Tools\Compiler Options\Directories\C++
Includes. Make sure that C:\DEV-CPP\include and C:\Dev-Cpp\include\curl are
included.
Linker Links
------------
1- Drop the Menu - Tools\Compiler Options\Directories\Compiler.
2- Make sure that the box "Add these commands to the linker command line" is
checked.
3- Include in the white space immediately below the box referred in 2 -lcurl
-lws2_32.
SSL Files
---------
1- Get the latest openSSL (as of time of this writing)
openssl-0.9.7e-win32-bin.zip for the minimalist package of the openssl-0.9.7e
binaries ported to MS Windows 95/98/NT/XP using the MingW32/GCC-3.1
development environment. The file may be downloaded at
https://curl.haxx.se/download/.
2- Open the above zip file. You will find two files - SDL.dll,
SDL_mixer.dll. Install them in the directory C:\WINDOWS\SYSTEM32 for Win 9x
users and c:\winnt\system32 for NT-family users.
Multithreading Files
--------------------
To be completed
#define
-------
1- Make sure that your program includes the following - #define CURL_STATICLIB
must be declared FIRST before any other define functions may be
added. Otherwise you may experience link errors.
2- Don't forget to include #include "curl/curl.h".
e.g.
#define CURL_STATICLIB
#include <windows.h>
#include "curl/curl.h"
#include <fstream>
#include <iostream>
#include <vector>
etc...
Static or Dynamic Library
-------------------------
The above steps apply for the use by a static library. Should you choose to
use a dynamic library you will be required to perform these additional steps.
1- Refer to Method I - DOS Command Line point # 6. Install libcurl.dll in the
directory C:\WINDOWS\SYSTEM32 for Win 9x users and c:\winnt\system32 for
NT-family users.
2- Refer to Linker Links point 3 - Replace -lcurl with -lcurldll.
Voila you're done.
The non-SSL static Library build may not be possible to use at least as of the
time of this writing - v7.14. Check reference emails - Phillipe and I found it
impossible to fully compile as certain files were missing for linking. No big
loss as SSL is a major plus.
Hope this Helps
Tom

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# how to install curl and libcurl
## Installing Binary Packages
Lots of people download binary distributions of curl and libcurl. This
document does not describe how to install curl or libcurl using such a binary
package. This document describes how to compile, build and install curl and
libcurl from source code.
## Building from git
If you get your code off a git repository instead of a release tarball, see
the `GIT-INFO` file in the root directory for specific instructions on how to
proceed.
# Unix
A normal Unix installation is made in three or four steps (after you've
unpacked the source archive):
./configure
make
make test (optional)
make install
You probably need to be root when doing the last command.
Get a full listing of all available configure options by invoking it like:
./configure --help
If you want to install curl in a different file hierarchy than `/usr/local`,
specify that when running configure:
./configure --prefix=/path/to/curl/tree
If you have write permission in that directory, you can do 'make install'
without being root. An example of this would be to make a local install in
your own home directory:
./configure --prefix=$HOME
make
make install
The configure script always tries to find a working SSL library unless
explicitly told not to. If you have OpenSSL installed in the default search
path for your compiler/linker, you don't need to do anything special. If you
have OpenSSL installed in /usr/local/ssl, you can run configure like:
./configure --with-ssl
If you have OpenSSL installed somewhere else (for example, /opt/OpenSSL) and
you have pkg-config installed, set the pkg-config path first, like this:
env PKG_CONFIG_PATH=/opt/OpenSSL/lib/pkgconfig ./configure --with-ssl
Without pkg-config installed, use this:
./configure --with-ssl=/opt/OpenSSL
If you insist on forcing a build without SSL support, even though you may
have OpenSSL installed in your system, you can run configure like this:
./configure --without-ssl
If you have OpenSSL installed, but with the libraries in one place and the
header files somewhere else, you have to set the LDFLAGS and CPPFLAGS
environment variables prior to running configure. Something like this should
work:
CPPFLAGS="-I/path/to/ssl/include" LDFLAGS="-L/path/to/ssl/lib" ./configure
If you have shared SSL libs installed in a directory where your run-time
linker doesn't find them (which usually causes configure failures), you can
provide the -R option to ld on some operating systems to set a hard-coded
path to the run-time linker:
LDFLAGS=-R/usr/local/ssl/lib ./configure --with-ssl
## More Options
To force a static library compile, disable the shared library creation by
running configure like:
./configure --disable-shared
To tell the configure script to skip searching for thread-safe functions, add
an option like:
./configure --disable-thread
If you're a curl developer and use gcc, you might want to enable more debug
options with the `--enable-debug` option.
curl can be built to use a whole range of libraries to provide various useful
services, and configure will try to auto-detect a decent default. But if you
want to alter it, you can select how to deal with each individual library.
## Select TLS backend
The default OpenSSL configure check will also detect and use BoringSSL or
libressl.
- GnuTLS: `--without-ssl --with-gnutls`.
- Cyassl: `--without-ssl --with-cyassl`
- NSS: `--without-ssl --with-nss`
- PolarSSL: `--without-ssl --with-polarssl`
- mbedTLS: `--without-ssl --with-mbedtls`
- axTLS: `--without-ssl --with-axtls`
- schannel: `--without-ssl --with-winssl`
- secure transport: `--with-winssl --with-darwinssl`
# Windows
## Building Windows DLLs and C run-time (CRT) linkage issues
As a general rule, building a DLL with static CRT linkage is highly
discouraged, and intermixing CRTs in the same app is something to avoid at
any cost.
Reading and comprehending Microsoft Knowledge Base articles KB94248 and
KB140584 is a must for any Windows developer. Especially important is full
understanding if you are not going to follow the advice given above.
- [How To Use the C Run-Time](https://support.microsoft.com/kb/94248/en-us)
- [How to link with the correct C Run-Time CRT library](https://support.microsoft.com/kb/140584/en-us)
- [Potential Errors Passing CRT Objects Across DLL Boundaries](https://msdn.microsoft.com/en-us/library/ms235460)
If your app is misbehaving in some strange way, or it is suffering from
memory corruption, before asking for further help, please try first to
rebuild every single library your app uses as well as your app using the
debug multithreaded dynamic C runtime.
If you get linkage errors read section 5.7 of the FAQ document.
## MingW32
Make sure that MinGW32's bin dir is in the search path, for example:
set PATH=c:\mingw32\bin;%PATH%
then run `mingw32-make mingw32` in the root dir. There are other
make targets available to build libcurl with more features, use:
- `mingw32-make mingw32-zlib` to build with Zlib support;
- `mingw32-make mingw32-ssl-zlib` to build with SSL and Zlib enabled;
- `mingw32-make mingw32-ssh2-ssl-zlib` to build with SSH2, SSL, Zlib;
- `mingw32-make mingw32-ssh2-ssl-sspi-zlib` to build with SSH2, SSL, Zlib
and SSPI support.
If you have any problems linking libraries or finding header files, be sure
to verify that the provided "Makefile.m32" files use the proper paths, and
adjust as necessary. It is also possible to override these paths with
environment variables, for example:
set ZLIB_PATH=c:\zlib-1.2.8
set OPENSSL_PATH=c:\openssl-1.0.2c
set LIBSSH2_PATH=c:\libssh2-1.6.0
It is also possible to build with other LDAP SDKs than MS LDAP; currently
it is possible to build with native Win32 OpenLDAP, or with the Novell CLDAP
SDK. If you want to use these you need to set these vars:
set LDAP_SDK=c:\openldap
set USE_LDAP_OPENLDAP=1
or for using the Novell SDK:
set USE_LDAP_NOVELL=1
If you want to enable LDAPS support then set LDAPS=1.
## Cygwin
Almost identical to the unix installation. Run the configure script in the
curl source tree root with `sh configure`. Make sure you have the sh
executable in /bin/ or you'll see the configure fail toward the end.
Run `make`
## Borland C++ compiler
Ensure that your build environment is properly set up to use the compiler and
associated tools. PATH environment variable must include the path to bin
subdirectory of your compiler installation, eg: `c:\Borland\BCC55\bin`
It is advisable to set environment variable BCCDIR to the base path of the
compiler installation.
set BCCDIR=c:\Borland\BCC55
In order to build a plain vanilla version of curl and libcurl run the
following command from curl's root directory:
make borland
To build curl and libcurl with zlib and OpenSSL support set environment
variables `ZLIB_PATH` and `OPENSSL_PATH` to the base subdirectories of the
already built zlib and OpenSSL libraries and from curl's root directory run
command:
make borland-ssl-zlib
libcurl library will be built in 'lib' subdirectory while curl tool is built
in 'src' subdirectory. In order to use libcurl library it is advisable to
modify compiler's configuration file bcc32.cfg located in
`c:\Borland\BCC55\bin` to reflect the location of libraries include paths for
example the '-I' line could result in something like:
-I"c:\Borland\BCC55\include;c:\curl\include;c:\openssl\inc32"
bcc3.cfg `-L` line could also be modified to reflect the location of of
libcurl library resulting for example:
-L"c:\Borland\BCC55\lib;c:\curl\lib;c:\openssl\out32"
In order to build sample program `simple.c` from the docs\examples
subdirectory run following command from mentioned subdirectory:
bcc32 simple.c libcurl.lib cw32mt.lib
In order to build sample program simplessl.c an SSL enabled libcurl is
required, as well as the OpenSSL libeay32.lib and ssleay32.lib libraries.
## Disabling Specific Protocols in Windows builds
The configure utility, unfortunately, is not available for the Windows
environment, therefore, you cannot use the various disable-protocol options of
the configure utility on this platform.
However, you can use the following defines to disable specific
protocols:
- `HTTP_ONLY` disables all protocols except HTTP
- `CURL_DISABLE_FTP` disables FTP
- `CURL_DISABLE_LDAP` disables LDAP
- `CURL_DISABLE_TELNET` disables TELNET
- `CURL_DISABLE_DICT` disables DICT
- `CURL_DISABLE_FILE` disables FILE
- `CURL_DISABLE_TFTP` disables TFTP
- `CURL_DISABLE_HTTP` disables HTTP
- `CURL_DISABLE_IMAP` disables IMAP
- `CURL_DISABLE_POP3` disables POP3
- `CURL_DISABLE_SMTP` disables SMTP
If you want to set any of these defines you have the following options:
- Modify lib/config-win32.h
- Modify lib/curl_setup.h
- Modify lib/Makefile.vc6
- Modify the "Preprocessor Definitions" in the libcurl project
Note: The pre-processor settings can be found using the Visual Studio IDE
under "Project -> Settings -> C/C++ -> General" in VC6 and "Project ->
Properties -> Configuration Properties -> C/C++ -> Preprocessor" in later
versions.
## Using BSD-style lwIP instead of Winsock TCP/IP stack in Win32 builds
In order to compile libcurl and curl using BSD-style lwIP TCP/IP stack it is
necessary to make definition of preprocessor symbol USE_LWIPSOCK visible to
libcurl and curl compilation processes. To set this definition you have the
following alternatives:
- Modify lib/config-win32.h and src/config-win32.h
- Modify lib/Makefile.vc6
- Modify the "Preprocessor Definitions" in the libcurl project
Note: The pre-processor settings can be found using the Visual Studio IDE
under "Project -> Settings -> C/C++ -> General" in VC6 and "Project ->
Properties -> Configuration Properties -> C/C++ -> Preprocessor" in later
versions.
Once that libcurl has been built with BSD-style lwIP TCP/IP stack support, in
order to use it with your program it is mandatory that your program includes
lwIP header file `<lwip/opt.h>` (or another lwIP header that includes this)
before including any libcurl header. Your program does not need the
`USE_LWIPSOCK` preprocessor definition which is for libcurl internals only.
Compilation has been verified with [lwIP
1.4.0](http://download.savannah.gnu.org/releases/lwip/lwip-1.4.0.zip) and
[contrib-1.4.0](http://download.savannah.gnu.org/releases/lwip/contrib-1.4.0.zip).
This BSD-style lwIP TCP/IP stack support must be considered experimental given
that it has been verified that lwIP 1.4.0 still needs some polish, and libcurl
might yet need some additional adjustment, caveat emptor.
## Important static libcurl usage note
When building an application that uses the static libcurl library on Windows,
you must add `-DCURL_STATICLIB` to your `CFLAGS`. Otherwise the linker will
look for dynamic import symbols.
## Legacy Windows and SSL
WinSSL (specifically SChannel from Windows SSPI), is the native SSL library in
Windows. However, WinSSL in Windows <= XP is unable to connect to servers that
no longer support the legacy handshakes and algorithms used by those
versions. If you will be using curl in one of those earlier versions of
Windows you should choose another SSL backend such as OpenSSL.
# Apple iOS and Mac OS X
On modern Apple operating systems, curl can be built to use Apple's SSL/TLS
implementation, Secure Transport, instead of OpenSSL. To build with Secure
Transport for SSL/TLS, use the configure option `--with-darwinssl`. (It is not
necessary to use the option `--without-ssl`.) This feature requires iOS 5.0 or
later, or OS X 10.5 ("Leopard") or later.
When Secure Transport is in use, the curl options `--cacert` and `--capath`
and their libcurl equivalents, will be ignored, because Secure Transport uses
the certificates stored in the Keychain to evaluate whether or not to trust
the server. This, of course, includes the root certificates that ship with the
OS. The `--cert` and `--engine` options, and their libcurl equivalents, are
currently unimplemented in curl with Secure Transport.
For OS X users: In OS X 10.8 ("Mountain Lion"), Apple made a major overhaul to
the Secure Transport API that, among other things, added support for the newer
TLS 1.1 and 1.2 protocols. To get curl to support TLS 1.1 and 1.2, you must
build curl on Mountain Lion or later, or by using the equivalent SDK. If you
set the `MACOSX_DEPLOYMENT_TARGET` environmental variable to an earlier
version of OS X prior to building curl, then curl will use the new Secure
Transport API on Mountain Lion and later, and fall back on the older API when
the same curl binary is executed on older cats. For example, running these
commands in curl's directory in the shell will build the code such that it
will run on cats as old as OS X 10.6 ("Snow Leopard") (using bash):
export MACOSX_DEPLOYMENT_TARGET="10.6"
./configure --with-darwinssl
make
# Cross compile
Download and unpack the curl package.
'cd' to the new directory. (e.g. `cd curl-7.12.3`)
Set environment variables to point to the cross-compile toolchain and call
configure with any options you need. Be sure and specify the `--host` and
`--build` parameters at configuration time. The following script is an
example of cross-compiling for the IBM 405GP PowerPC processor using the
toolchain from MonteVista for Hardhat Linux.
#! /bin/sh
export PATH=$PATH:/opt/hardhat/devkit/ppc/405/bin
export CPPFLAGS="-I/opt/hardhat/devkit/ppc/405/target/usr/include"
export AR=ppc_405-ar
export AS=ppc_405-as
export LD=ppc_405-ld
export RANLIB=ppc_405-ranlib
export CC=ppc_405-gcc
export NM=ppc_405-nm
./configure --target=powerpc-hardhat-linux
--host=powerpc-hardhat-linux
--build=i586-pc-linux-gnu
--prefix=/opt/hardhat/devkit/ppc/405/target/usr/local
--exec-prefix=/usr/local
You may also need to provide a parameter like `--with-random=/dev/urandom` to
configure as it cannot detect the presence of a random number generating
device for a target system. The `--prefix` parameter specifies where curl
will be installed. If `configure` completes successfully, do `make` and `make
install` as usual.
In some cases, you may be able to simplify the above commands to as little as:
./configure --host=ARCH-OS
# REDUCING SIZE
There are a number of configure options that can be used to reduce the size of
libcurl for embedded applications where binary size is an important factor.
First, be sure to set the CFLAGS variable when configuring with any relevant
compiler optimization flags to reduce the size of the binary. For gcc, this
would mean at minimum the -Os option, and potentially the `-march=X`,
`-mdynamic-no-pic` and `-flto` options as well, e.g.
./configure CFLAGS='-Os' LDFLAGS='-Wl,-Bsymbolic'...
Note that newer compilers often produce smaller code than older versions
due to improved optimization.
Be sure to specify as many `--disable-` and `--without-` flags on the
configure command-line as you can to disable all the libcurl features that you
know your application is not going to need. Besides specifying the
`--disable-PROTOCOL` flags for all the types of URLs your application will not
use, here are some other flags that can reduce the size of the library:
- `--disable-ares` (disables support for the C-ARES DNS library)
- `--disable-cookies` (disables support for HTTP cookies)
- `--disable-crypto-auth` (disables HTTP cryptographic authentication)
- `--disable-ipv6` (disables support for IPv6)
- `--disable-manual` (disables support for the built-in documentation)
- `--disable-proxy` (disables support for HTTP and SOCKS proxies)
- `--disable-unix-sockets` (disables support for UNIX sockets)
- `--disable-verbose` (eliminates debugging strings and error code strings)
- `--disable-versioned-symbols` (disables support for versioned symbols)
- `--enable-hidden-symbols` (eliminates unneeded symbols in the shared library)
- `--without-libidn` (disables support for the libidn DNS library)
- `--without-librtmp` (disables support for RTMP)
- `--without-ssl` (disables support for SSL/TLS)
- `--without-zlib` (disables support for on-the-fly decompression)
The GNU compiler and linker have a number of options that can reduce the
size of the libcurl dynamic libraries on some platforms even further.
Specify them by providing appropriate CFLAGS and LDFLAGS variables on the
configure command-line, e.g.
CFLAGS="-Os -ffunction-sections -fdata-sections
-fno-unwind-tables -fno-asynchronous-unwind-tables -flto"
LDFLAGS="-Wl,-s -Wl,-Bsymbolic -Wl,--gc-sections"
Be sure also to strip debugging symbols from your binaries after compiling
using 'strip' (or the appropriate variant if cross-compiling). If space is
really tight, you may be able to remove some unneeded sections of the shared
library using the -R option to objcopy (e.g. the .comment section).
Using these techniques it is possible to create a basic HTTP-only shared
libcurl library for i386 Linux platforms that is only 109 KiB in size, and an
FTP-only library that is 109 KiB in size (as of libcurl version 7.45.0, using
gcc 4.9.2).
You may find that statically linking libcurl to your application will result
in a lower total size than dynamically linking.
Note that the curl test harness can detect the use of some, but not all, of
the `--disable` statements suggested above. Use will cause tests relying on
those features to fail. The test harness can be manually forced to skip the
relevant tests by specifying certain key words on the runtests.pl command
line. Following is a list of appropriate key words:
- `--disable-cookies` !cookies
- `--disable-manual` !--manual
- `--disable-proxy` !HTTP\ proxy !proxytunnel !SOCKS4 !SOCKS5
# PORTS
This is a probably incomplete list of known hardware and operating systems
that curl has been compiled for. If you know a system curl compiles and
runs on, that isn't listed, please let us know!
- Alpha DEC OSF 4
- Alpha Digital UNIX v3.2
- Alpha FreeBSD 4.1, 4.5
- Alpha Linux 2.2, 2.4
- Alpha NetBSD 1.5.2
- Alpha OpenBSD 3.0
- Alpha OpenVMS V7.1-1H2
- Alpha Tru64 v5.0 5.1
- AVR32 Linux
- ARM Android 1.5, 2.1, 2.3, 3.2, 4.x
- ARM INTEGRITY
- ARM iOS
- Cell Linux
- Cell Cell OS
- HP-PA HP-UX 9.X 10.X 11.X
- HP-PA Linux
- HP3000 MPE/iX
- MicroBlaze uClinux
- MIPS IRIX 6.2, 6.5
- MIPS Linux
- OS/400
- Pocket PC/Win CE 3.0
- Power AIX 3.2.5, 4.2, 4.3.1, 4.3.2, 5.1, 5.2
- PowerPC Darwin 1.0
- PowerPC INTEGRITY
- PowerPC Linux
- PowerPC Mac OS 9
- PowerPC Mac OS X
- SH4 Linux 2.6.X
- SH4 OS21
- SINIX-Z v5
- Sparc Linux
- Sparc Solaris 2.4, 2.5, 2.5.1, 2.6, 7, 8, 9, 10
- Sparc SunOS 4.1.X
- StrongARM (and other ARM) RISC OS 3.1, 4.02
- StrongARM/ARM7/ARM9 Linux 2.4, 2.6
- StrongARM NetBSD 1.4.1
- Symbian OS (P.I.P.S.) 9.x
- TPF
- Ultrix 4.3a
- UNICOS 9.0
- i386 BeOS
- i386 DOS
- i386 eCos 1.3.1
- i386 Esix 4.1
- i386 FreeBSD
- i386 HURD
- i386 Haiku OS
- i386 Linux 1.3, 2.0, 2.2, 2.3, 2.4, 2.6
- i386 Mac OS X
- i386 MINIX 3.1
- i386 NetBSD
- i386 Novell NetWare
- i386 OS/2
- i386 OpenBSD
- i386 QNX 6
- i386 SCO unix
- i386 Solaris 2.7
- i386 Windows 95, 98, ME, NT, 2000, XP, 2003
- i486 ncr-sysv4.3.03 (NCR MP-RAS)
- ia64 Linux 2.3.99
- m68k AmigaOS 3
- m68k Linux
- m68k uClinux
- m68k OpenBSD
- m88k dg-dgux5.4R3.00
- s390 Linux
- x86_64 Linux
- XScale/PXA250 Linux 2.4
- Nios II uClinux

12
docs/Makefile.am
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@ -33,12 +33,12 @@ SUBDIRS = examples libcurl
CLEANFILES = $(GENHTMLPAGES) $(PDFPAGES)
EXTRA_DIST = MANUAL BUGS CONTRIBUTE.md FAQ FEATURES INTERNALS.md \
SSLCERTS.md README.win32 RESOURCES TODO TheArtOfHttpScripting THANKS \
VERSIONS KNOWN_BUGS BINDINGS $(man_MANS) HISTORY.md INSTALL \
LICENSE-MIXING.md README.netware INSTALL.devcpp MAIL-ETIQUETTE \
HTTP-COOKIES.md SECURITY.md RELEASE-PROCEDURE SSL-PROBLEMS.md HTTP2.md \
ROADMAP.md CODE_OF_CONDUCT.md CODE_STYLE.md CHECKSRC.md
EXTRA_DIST = MANUAL BUGS CONTRIBUTE.md FAQ FEATURES INTERNALS.md SSLCERTS.md \
README.win32 RESOURCES TODO TheArtOfHttpScripting THANKS VERSIONS KNOWN_BUGS \
BINDINGS $(man_MANS) HISTORY.md INSTALL INSTALL.md LICENSE-MIXING.md \
README.netware MAIL-ETIQUETTE HTTP-COOKIES.md SECURITY.md RELEASE-PROCEDURE \
SSL-PROBLEMS.md HTTP2.md ROADMAP.md CODE_OF_CONDUCT.md CODE_STYLE.md \
CHECKSRC.md
MAN2HTML= roffit $< >$@