mirror of https://github.com/moparisthebest/curl
317 lines
9.9 KiB
Plaintext
317 lines
9.9 KiB
Plaintext
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#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at http://curl.haxx.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# $Id$
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#***************************************************************************
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# File version for 'aclocal' use. Keep it a single number.
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# serial 1
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dnl CURL_CHECK_COMPILER
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dnl -------------------------------------------------
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dnl Verify if the C compiler being used is known.
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AC_DEFUN([CURL_CHECK_COMPILER], [
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#
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compiler_id="unknown"
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compiler_num="0"
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#
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CURL_CHECK_COMPILER_DEC
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CURL_CHECK_COMPILER_IBM
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CURL_CHECK_COMPILER_INTEL
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CURL_CHECK_COMPILER_GNU
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#
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])
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dnl CURL_CHECK_COMPILER_DEC
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dnl -------------------------------------------------
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dnl Verify if the C compiler being used is DEC's.
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AC_DEFUN([CURL_CHECK_COMPILER_DEC], [
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AC_MSG_CHECKING([whether we are using the DEC/Compaq C compiler])
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CURL_CHECK_DEF([__DECC], [], [silent])
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CURL_CHECK_DEF([__DECC_VER], [], [silent])
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if test "$curl_cv_have_def___DECC" = "yes" &&
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test "$curl_cv_have_def___DECC_VER" = "yes"; then
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AC_MSG_RESULT([yes])
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compiler_id="DECC"
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else
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AC_MSG_RESULT([no])
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fi
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])
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dnl CURL_CHECK_COMPILER_GNU
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dnl -------------------------------------------------
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dnl Verify if the C compiler being used is GNU's.
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AC_DEFUN([CURL_CHECK_COMPILER_GNU], [
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AC_REQUIRE([CURL_CHECK_COMPILER_INTEL])dnl
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#
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AC_MSG_CHECKING([whether we are using the GNU C compiler])
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CURL_CHECK_DEF([__GNUC__], [], [silent])
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if test "$curl_cv_have_def___GNUC__" = "yes" &&
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test "$compiler_id" = "unknown"; then
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AC_MSG_RESULT([yes])
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compiler_id="GNUC"
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gccver=`$CC -dumpversion`
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gccvhi=`echo $gccver | cut -d . -f1`
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gccvlo=`echo $gccver | cut -d . -f2`
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compiler_num=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null`
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else
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AC_MSG_RESULT([no])
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fi
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])
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dnl CURL_CHECK_COMPILER_IBM
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dnl -------------------------------------------------
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dnl Verify if the C compiler being used is IBM's.
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AC_DEFUN([CURL_CHECK_COMPILER_IBM], [
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AC_MSG_CHECKING([whether we are using the IBM C compiler])
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CURL_CHECK_DEF([__IBMC__], [], [silent])
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if test "$curl_cv_have_def___IBMC__" = "yes"; then
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AC_MSG_RESULT([yes])
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compiler_id="IBMC"
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else
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AC_MSG_RESULT([no])
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fi
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])
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dnl CURL_CHECK_COMPILER_INTEL
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dnl -------------------------------------------------
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dnl Verify if the C compiler being used is Intel's.
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AC_DEFUN([CURL_CHECK_COMPILER_INTEL], [
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AC_BEFORE([$0],[CURL_CHECK_COMPILER_GNU])dnl
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AC_MSG_CHECKING([whether we are using the Intel C compiler])
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CURL_CHECK_DEF([__INTEL_COMPILER], [], [silent])
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if test "$curl_cv_have_def___INTEL_COMPILER" = "yes"; then
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AC_MSG_RESULT([yes])
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CURL_CHECK_DEF([__unix__], [], [silent])
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if test "$curl_cv_have_def___unix__" = "yes"; then
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compiler_id="ICC_unix"
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else
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compiler_id="ICC_windows"
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fi
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compiler_num="$curl_cv_def___INTEL_COMPILER"
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else
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AC_MSG_RESULT([no])
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fi
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])
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dnl CURL_PROCESS_CC_BASIC_OPTS
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dnl -------------------------------------------------
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dnl Sets compiler options/flags which are independant
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dnl of configure's debug or warnings options.
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AC_DEFUN([CURL_PROCESS_CC_BASIC_OPTS], [
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AC_REQUIRE([CURL_CHECK_COMPILER])dnl
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#
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if test "$compiler_id" = "DECC"; then
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dnl Select strict ANSI C compiler mode
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CFLAGS="$CFLAGS -std1"
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dnl Turn off optimizer ANSI C aliasing rules
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CFLAGS="$CFLAGS -noansi_alias"
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dnl Generate warnings for missing function prototypes
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CFLAGS="$CFLAGS -warnprotos"
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dnl Change some warnings into fatal errors
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CFLAGS="$CFLAGS -msg_fatal toofewargs,toomanyargs"
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fi
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#
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if test "$compiler_id" = "IBMC"; then
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dnl Ensure that compiler optimizations are always thread-safe.
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CFLAGS="$CFLAGS -qthreaded"
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dnl Disable type based strict aliasing optimizations, using worst
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dnl case aliasing assumptions when compiling. Type based aliasing
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dnl would restrict the lvalues that could be safely used to access
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dnl a data object.
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CFLAGS="$CFLAGS -qnoansialias"
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dnl Force compiler to stop after the compilation phase, without
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dnl generating an object code file when compilation has errors.
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CFLAGS="$CFLAGS -qhalt=e"
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fi
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#
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if test "$compiler_id" = "ICC_unix"; then
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dnl On unix this compiler uses gcc's header files, so
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dnl we select ANSI C89 dialect plus GNU extensions.
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CPPFLAGS="$CPPFLAGS -std=gnu89"
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dnl Change some warnings into errors
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dnl #140: too many arguments in function call
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dnl #147: declaration is incompatible with 'previous one'
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dnl #165: too few arguments in function call
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dnl #266: function declared implicitly
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CPPFLAGS="$CPPFLAGS -we 140,147,165,266"
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dnl Disable some remarks
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dnl #279: controlling expression is constant
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dnl #981: operands are evaluated in unspecified order
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dnl #1469: "cc" clobber ignored
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if test "$compiler_num" -lt "910"; then
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CPPFLAGS="$CPPFLAGS -wd 279"
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fi
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CPPFLAGS="$CPPFLAGS -wd 981,1469"
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dnl Disable use of ANSI C aliasing rules in optimizations
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CFLAGS="$CFLAGS -no-ansi-alias"
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dnl Disable floating point optimizations
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CFLAGS="$CFLAGS -fp-model precise"
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fi
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])
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dnl CURL_PROCESS_CC_DEBUG_OPTS
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dnl -------------------------------------------------
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dnl Sets compiler options/flags which depend on
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dnl configure's debug given option.
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AC_DEFUN([CURL_PROCESS_CC_DEBUG_OPTS], [
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AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl
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AC_REQUIRE([CURL_CHECK_COMPILER])dnl
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#
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if test "$want_debug" = "yes"; then
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CFLAGS="$CFLAGS -g"
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fi
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#
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if test "$want_debug" = "no"; then
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dnl strip off optimizer flags
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NEWFLAGS=""
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for flag in $CFLAGS; do
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case "$flag" in
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-O*)
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dnl echo "cut off $flag"
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;;
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*)
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NEWFLAGS="$NEWFLAGS $flag"
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;;
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esac
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done
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CFLAGS=$NEWFLAGS
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fi
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#
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])
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dnl CURL_PROCESS_CC_WARNING_OPTS
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dnl -------------------------------------------------
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dnl Sets compiler options/flags which depend on
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dnl configure's warnings given option.
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AC_DEFUN([CURL_PROCESS_CC_WARNING_OPTS], [
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AC_REQUIRE([CURL_CHECK_OPTION_WARNINGS])dnl
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AC_REQUIRE([CURL_CHECK_COMPILER])dnl
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#
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if test "$compiler_id" = "DECC"; then
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if test "$want_warnings" = "yes"; then
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dnl Select a higher warning level than default level2
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CFLAGS="$CFLAGS -msg_enable level3"
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fi
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fi
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#
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if test "$compiler_id" = "ICC_unix"; then
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if test "$want_warnings" = "yes"; then
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if test "$compiler_num" -gt "600"; then
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dnl Show errors, warnings, and remarks
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CPPFLAGS="$CPPFLAGS -Wall"
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dnl Perform extra compile-time code checking
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CPPFLAGS="$CPPFLAGS -Wcheck"
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fi
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fi
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fi
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#
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if test "$compiler_id" = "GNUC"; then
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#
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# FIXME: Some of these warnings should be changed into errors
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# and moved to CURL-PROCESS-CC-BASIC-OPTS
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#
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if test "$want_warnings" = "yes"; then
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dnl this is a set of options we believe *ALL* gcc versions support:
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WARN="-W -Wall -Wwrite-strings -pedantic -Wpointer-arith -Wnested-externs -Winline -Wmissing-prototypes"
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dnl -Wcast-align is a bit too annoying on all gcc versions ;-)
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if test "$compiler_num" -ge "207"; then
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dnl gcc 2.7 or later
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WARN="$WARN -Wmissing-declarations"
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fi
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if test "$compiler_num" -gt "295"; then
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dnl only if the compiler is newer than 2.95 since we got lots of
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dnl "`_POSIX_C_SOURCE' is not defined" in system headers with
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dnl gcc 2.95.4 on FreeBSD 4.9!
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WARN="$WARN -Wundef -Wno-long-long -Wsign-compare -Wshadow -Wno-multichar"
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fi
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if test "$compiler_num" -ge "296"; then
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dnl gcc 2.96 or later
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WARN="$WARN -Wfloat-equal"
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fi
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if test "$compiler_num" -gt "296"; then
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dnl this option does not exist in 2.96
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WARN="$WARN -Wno-format-nonliteral"
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fi
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dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
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dnl on i686-Linux as it gives us heaps with false positives.
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dnl Also, on gcc 4.0.X it is totally unbearable and complains all
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dnl over making it unusable for generic purposes. Let's not use it.
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if test "$compiler_num" -ge "303"; then
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dnl gcc 3.3 and later
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WARN="$WARN -Wendif-labels -Wstrict-prototypes"
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fi
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if test "$compiler_num" -ge "304"; then
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# try these on gcc 3.4
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WARN="$WARN -Wdeclaration-after-statement"
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fi
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for flag in $CPPFLAGS; do
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case "$flag" in
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-I*)
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dnl Include path, provide a -isystem option for the same dir
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dnl to prevent warnings in those dirs. The -isystem was not very
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dnl reliable on earlier gcc versions.
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add=`echo $flag | sed 's/^-I/-isystem /g'`
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WARN="$WARN $add"
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;;
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esac
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done
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CFLAGS="$CFLAGS $WARN"
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AC_MSG_NOTICE([Added this set of compiler options: $WARN])
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fi
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fi
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#
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])
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dnl CURL_PROCESS_DEBUG_BUILD_OPTS
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dnl -------------------------------------------------
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dnl Settings which depend on configure's debug given
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dnl option, and further configure the build process.
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AC_DEFUN([CURL_PROCESS_DEBUG_BUILD_OPTS], [
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AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl
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AC_BEFORE([$0],[AC_PROG_LIBTOOL])dnl
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#
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if test "$want_debug" = "yes"; then
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CPPFLAGS="$CPPFLAGS -DCURLDEBUG"
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fi
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#
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])
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