mirror of
https://github.com/moparisthebest/curl
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5c8849cede
Reduce risk for conflicting docs and makes it to a single place to fix and polish. add these missing options to the readme: ENABLE_OPENSSL_AUTO_LOAD_CONFIG and ENABLE_UNICODE clarify ENABLE_SCHANNEL default varies Fixes #6216 Closes #6227 Co-Authored-by: Jay Satiro
133 lines
6.4 KiB
Markdown
133 lines
6.4 KiB
Markdown
# Building curl with Visual C++
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This document describes how to compile, build and install curl and libcurl
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from sources using the Visual C++ build tool. To build with VC++, you will of
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course have to first install VC++. The minimum required version of VC is 6
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(part of Visual Studio 6). However using a more recent version is strongly
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recommended.
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VC++ is also part of the Windows Platform SDK. You do not have to install the
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full Visual Studio or Visual C++ if all you want is to build curl.
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The latest Platform SDK can be downloaded freely from [Windows SDK and
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emulator
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archive](https://developer.microsoft.com/en-us/windows/downloads/sdk-archive)
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## Prerequisites
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If you wish to support zlib, openssl, c-ares, ssh2, you will have to download
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them separately and copy them to the deps directory as shown below:
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somedirectory\
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|_curl-src
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| |_winbuild
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|_deps
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|_ lib
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|_ include
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|_ bin
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It is also possible to create the deps directory in some other random places
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and tell the Makefile its location using the WITH_DEVEL option.
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## Building straight from git
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When you check out code git and build it, as opposed from a released source
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code archive, you need to first run the `buildconf.bat` batch file (present
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in the source code root directory) to set things up.
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## Open a command prompt
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Open a Visual Studio Command prompt:
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Using the **'Developer Command Prompt for VS [version]'** menu entry: where
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[version} is the Visual Studio version. The developer prompt at default uses
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the x86 mode. It is required to call `Vcvarsall.bat` to setup the prompt for
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the machine type you want. This type of command prompt may not exist in all
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Visual Studio versions.
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See also: [Developer Command Prompt for Visual
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Studio](https://docs.microsoft.com/en-us/dotnet/framework/tools/developer-command-prompt-for-vs)
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and [How to: Enable a 64-Bit, x64 hosted MSVC toolset on the command
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line](https://docs.microsoft.com/en-us/cpp/build/how-to-enable-a-64-bit-visual-cpp-toolset-on-the-command-line)
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Using the **'VS [version] [platform] [type] Command Prompt'** menu entry:
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where [version] is the Visual Studio version, [platform] is e.g. x64 and
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[type] Native of Cross platform build. This type of command prompt may not
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exist in all Visual Studio versions.
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See also: [Set the Path and Environment Variables for Command-Line Builds](https://msdn.microsoft.com/en-us/library/f2ccy3wt.aspx)
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## Build in the console
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Once you are in the console, go to the winbuild directory in the Curl
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sources:
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cd curl-src\winbuild
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Then you can call `nmake /f Makefile.vc` with the desired options (see
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below). The builds will be in the top src directory, `builds\` directory, in
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a directory named using the options given to the nmake call.
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nmake /f Makefile.vc mode=<static or dll> <options>
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where `<options>` is one or many of:
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- `VC=<6,7,8,9,10,11,12,14,15>` - VC version
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- `WITH_DEVEL=<path>` - Paths for the development files (SSL, zlib, etc.)
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Defaults to sibbling directory deps: ../deps
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Libraries can be fetched at https://windows.php.net/downloads/php-sdk/deps/
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Uncompress them into the deps folder.
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- `WITH_SSL=<dll/static>` - Enable OpenSSL support, DLL or static
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- `WITH_NGHTTP2=<dll/static>` - Enable HTTP/2 support, DLL or static
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- `WITH_MBEDTLS=<dll/static>` - Enable mbedTLS support, DLL or static
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- `WITH_CARES=<dll/static>` - Enable c-ares support, DLL or static
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- `WITH_ZLIB=<dll/static>` - Enable zlib support, DLL or static
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- `WITH_SSH2=<dll/static>` - Enable libSSH2 support, DLL or static
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- `WITH_PREFIX=<dir>` - Where to install the build
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- `ENABLE_SSPI=<yes/no>` - Enable SSPI support, defaults to yes
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- `ENABLE_IPV6=<yes/no>` - Enable IPv6, defaults to yes
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- `ENABLE_IDN=<yes or no>` - Enable use of Windows IDN APIs, defaults to yes
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Requires Windows Vista or later
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- `ENABLE_SCHANNEL=<yes/no>` - Enable native Windows SSL support, defaults
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to yes if SSPI and no other SSL library
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- `ENABLE_OPENSSL_AUTO_LOAD_CONFIG=<yes/no>`
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- Enable loading OpenSSL configuration
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automatically, defaults to yes
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- `ENABLE_UNICODE=<yes/no>` - Enable UNICODE support, defaults to no
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- `GEN_PDB=<yes/no>` - Generate Program Database (debug symbols for release build)
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- `DEBUG=<yes/no>` - Debug builds
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- `MACHINE=<x86/x64>` - Target architecture (default is x86)
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- `CARES_PATH=<path>` - Custom path for c-ares
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- `MBEDTLS_PATH=<path>` - Custom path for mbedTLS
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- `NGHTTP2_PATH=<path>` - Custom path for nghttp2
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- `SSH2_PATH=<path>` - Custom path for libSSH2
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- `SSL_PATH=<path>` - Custom path for OpenSSL
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- `ZLIB_PATH=<path>` - Custom path for zlib
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## Static linking of Microsoft's C RunTime (CRT):
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If you are using mode=static nmake will create and link to the static build
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of libcurl but *not* the static CRT. If you must you can force nmake to link
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in the static CRT by passing RTLIBCFG=static. Typically you shouldn't use
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that option, and nmake will default to the DLL CRT. RTLIBCFG is rarely used
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and therefore rarely tested. When passing RTLIBCFG for a configuration that
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was already built but not with that option, or if the option was specified
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differently, you must destroy the build directory containing the
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configuration so that nmake can build it from scratch.
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## Building your own application with a static libcurl
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When building an application that uses the static libcurl library on Windows,
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you must define CURL_STATICLIB. Otherwise the linker will look for dynamic
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import symbols.
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## Legacy Windows and SSL
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When you build curl using the build files in this directory the default SSL
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backend will be Schannel (Windows SSPI), the native SSL library that comes
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with the Windows OS. Schannel in Windows <= XP is not able to connect to
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servers that no longer support the legacy handshakes and algorithms used by
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those versions. If you will be using curl in one of those earlier versions of
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Windows you should choose another SSL backend like OpenSSL.
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