1# -*- Autoconf -*- 2# This file is part of the aMule Project. 3# 4# Copyright (c) 2003-2011 aMule Team ( admin@amule.org / http://www.amule.org ) 5# 6# Any parts of this program derived from the xMule, lMule or eMule project, 7# or contributed by third-party developers are copyrighted by their 8# respective authors. 9# 10# This program is free software; you can redistribute it and/or modify 11# it under the terms of the GNU General Public License as published by 12# the Free Software Foundation; either version 2 of the License, or 13# (at your option) any later version. 14# 15# This program is distributed in the hope that it will be useful, 16# but WITHOUT ANY WARRANTY; without even the implied warranty of 17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18# GNU General Public License for more details. 19# 20# You should have received a copy of the GNU General Public License 21# along with this program; if not, write to the Free Software 22# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA 23# 24# 25# This package has been tested with GNU Autoconf 2.59, and not guaranteed to 26# work with any other version. However, you only need to worry about it if 27# you're cross-compiling. 28 29# _AC_CHECK_BUILD_PREFIX 30# ----------------------- 31# Checks and sets the build prefix, if it is given by --build. 32AC_DEFUN([_AC_CHECK_BUILD_PREFIX], 33[ac_build_prefix= 34test -n "$build_alias" && ac_build_prefix=$build_alias- 35]) # AC_CHECK_BUILD_PREFIX 36 37 38# AC_PROG_BUILD_CC([COMPILER ...]) 39# -------------------------- 40# COMPILER ... is a space separated list of C compilers to search for. 41# This just gives the user an opportunity to specify an alternative 42# search list for the C compiler. 43# 44# IMPORTANT: Run all other compiler tests *before* calling this macro! 45# 46# This is a stripped-down check, it checks only what we need, 47# i.e. BUILD_CC and BUILD_EXEEXT 48# 49AC_DEFUN([AC_PROG_BUILD_CC], 50[AC_REQUIRE([_AC_CHECK_BUILD_PREFIX])dnl 51dnl Set new names of important variables. 52pushdef([ac_tool_prefix], [ac_build_prefix])dnl 53pushdef([CC], [BUILD_CC])dnl 54pushdef([EXEEXT], [BUILD_EXEEXT])dnl 55pushdef([ac_cv_exeext], [ac_cv_build_exeext])dnl 56pushdef([ac_exeext], [ac_build_exeext])dnl 57dnl Don't use the values for the cross-compiler 58pushdef([CPPFLAGS], [BUILD_CPPFLAGS])dnl 59pushdef([CFLAGS], [BUILD_CFLAGS])dnl 60pushdef([LDFLAGS], [BUILD_LDFLAGS])dnl 61pushdef([LIBS], [BUILD_LIBS])dnl 62 63# Even if we're cross-compiling, we want a compiler here 64# that is not a cross-compiler. 65saved_cross=$cross_compiling 66cross_compiling=no 67 68dnl From now on, this is just a mere copy of Autoconf's AC_PROG_CC macro. 69AC_LANG_PUSH(C)dnl 70m4_ifval([$1], 71 [AC_CHECK_TOOLS(CC, [$1])], 72[AC_CHECK_TOOL(CC, gcc) 73if test -z "$CC"; then 74 AC_CHECK_TOOL(CC, cc) 75fi 76if test -z "$CC"; then 77 AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc) 78fi 79if test -z "$CC"; then 80 AC_CHECK_TOOLS(CC, cl) 81fi 82]) 83 84test -z "$CC" && AC_MSG_FAILURE([no acceptable C compiler found in \$PATH]) 85 86# Provide some information about the compiler. 87echo "$as_me:$LINENO:" \ 88 "checking for _AC_LANG compiler version" >&AS_MESSAGE_LOG_FD 89ac_compiler=`set X $ac_compile; echo $[2]` 90_AC_EVAL([$ac_compiler --version </dev/null >&AS_MESSAGE_LOG_FD]) 91_AC_EVAL([$ac_compiler -v </dev/null >&AS_MESSAGE_LOG_FD]) 92_AC_EVAL([$ac_compiler -V </dev/null >&AS_MESSAGE_LOG_FD]) 93 94dnl Forcibly include _AC_COMPILER_EXEEXT, to determine the build exeext. 95_AC_COMPILER_EXEEXT 96dnl End of copy, here some parts are stripped out. We only want a working C 97dnl compiler, and doesn't need the objext, the preprocessor, the dependency 98dnl style, whether it's gnu or not, etc. 99 100# Restore configuration environment 101cross_compiling=$saved_cross 102 103dnl Restore variable names. 104popdef([LIBS])dnl 105popdef([LDFLAGS])dnl 106popdef([CFLAGS])dnl 107popdef([CPPFLAGS])dnl 108popdef([ac_exeext])dnl 109popdef([ac_cv_exeext])dnl 110popdef([EXEEXT])dnl 111popdef([CC])dnl 112popdef([ac_tool_prefix])dnl 113dnl 114dnl AC_LANG_POP(C) must be called after the variable names are restored, thus 115dnl it will restore the correct (host) environment, not the build environment. 116AC_LANG_POP(C)dnl 117dnl Substitute variables for the build compiler 118AC_SUBST(BUILD_EXEEXT)dnl 119AC_SUBST(BUILD_CPPFLAGS)dnl 120AC_SUBST(BUILD_CFLAGS)dnl 121AC_SUBST(BUILD_LDFLAGS)dnl 122]) # AC_PROG_BUILD_CC 123