| dnl Available from the GNU Autoconf Macro Archive at: |
| dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_prog_cc_for_build.html |
| dnl |
| dnl All content of this archive is free software; |
| dnl you can redistribute it and/or modify it under the terms of the GNU |
| dnl General Public License as published by the Free Software Foundation; |
| dnl either version 2, or (at your option) any later version. |
| dnl |
| dnl As a special exception, the respective Autoconf Macro's copyright |
| dnl owner gives unlimited permission to copy, distribute and modify the |
| dnl configure scripts that are the output of Autoconf when processing the |
| dnl Macro. You need not follow the terms of the GNU General Public License |
| dnl when using or distributing such scripts, even though portions of the |
| dnl text of the Macro appear in them. The GNU General Public License (GPL) |
| dnl does govern all other use of the material that constitutes the |
| dnl Autoconf Macro. |
| dnl |
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| |
| dnl Synopsis AC_PROG_CC_FOR_BUILD |
| dnl |
| dnl This macro searches for a C compiler that generates native |
| dnl executables, that is a C compiler that surely is not a cross-compiler. |
| dnl This can be useful if you have to generate source code at compile-time |
| dnl like for example GCC does. |
| dnl |
| dnl The macro sets the CC_FOR_BUILD and CPP_FOR_BUILD macros to anything |
| dnl needed to compile or link (CC_FOR_BUILD) and preprocess |
| dnl (CPP_FOR_BUILD). The value of these variables can be overridden by |
| dnl the user by specifying a compiler with an environment variable (like |
| dnl you do for standard CC). |
| dnl |
| dnl It also sets BUILD_EXEEXT and BUILD_OBJEXT to the executable and |
| dnl object file extensions for the build platform, and GCC_FOR_BUILD |
| dnl to `yes' if the compiler we found is GCC. All these variables but |
| dnl GCC_FOR_BUILD are substituted in the Makefile. |
| dnl |
| dnl Author Paolo Bonzini <bonzini@gnu.org> |
| dnl |
| AC_DEFUN([AC_PROG_CC_FOR_BUILD], [dnl |
| AC_REQUIRE([AC_PROG_CC])dnl |
| AC_REQUIRE([AC_PROG_CPP])dnl |
| AC_REQUIRE([AC_EXEEXT])dnl |
| AC_REQUIRE([AC_CANONICAL_SYSTEM])dnl |
| dnl |
| pushdef([AC_TRY_COMPILER], [ |
| cat > conftest.$ac_ext << EOF |
| #line __oline__ "configure" |
| #include "confdefs.h" |
| [$1] |
| EOF |
| # If we can't run a trivial program, we are probably using a cross |
| compiler. |
| # Fail miserably. |
| if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext} && (./conftest; |
| exit) 2>/dev/null; then |
| [$2]=yes |
| else |
| echo "configure: failed program was:" >&AC_FD_CC |
| cat conftest.$ac_ext >&AC_FD_CC |
| [$2]=no |
| fi |
| [$3]=no |
| rm -fr conftest*])dnl |
| |
| dnl Use the standard macros, but make them use other variable names |
| dnl |
| pushdef([cross_compiling], [#])dnl |
| pushdef([ac_cv_prog_CPP], ac_cv_build_prog_CPP)dnl |
| pushdef([ac_cv_prog_gcc], ac_cv_build_prog_gcc)dnl |
| pushdef([ac_cv_prog_cc_works], ac_cv_build_prog_cc_works)dnl |
| pushdef([ac_cv_prog_cc_cross], ac_cv_build_prog_cc_cross)dnl |
| pushdef([ac_cv_prog_cc_g], ac_cv_build_prog_cc_g)dnl |
| pushdef([ac_cv_exeext], ac_cv_build_exeext)dnl |
| pushdef([ac_cv_objext], ac_cv_build_objext)dnl |
| pushdef([ac_exeext], ac_build_exeext)dnl |
| pushdef([ac_objext], ac_build_objext)dnl |
| pushdef([CC], CC_FOR_BUILD)dnl |
| pushdef([CPP], CPP_FOR_BUILD)dnl |
| pushdef([CFLAGS], CFLAGS_FOR_BUILD)dnl |
| pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl |
| pushdef([host], build)dnl |
| pushdef([host_alias], build_alias)dnl |
| pushdef([host_cpu], build_cpu)dnl |
| pushdef([host_vendor], build_vendor)dnl |
| pushdef([host_os], build_os)dnl |
| pushdef([ac_cv_host], ac_cv_build)dnl |
| pushdef([ac_cv_host_alias], ac_cv_build_alias)dnl |
| pushdef([ac_cv_host_cpu], ac_cv_build_cpu)dnl |
| pushdef([ac_cv_host_vendor], ac_cv_build_vendor)dnl |
| pushdef([ac_cv_host_os], ac_cv_build_os)dnl |
| pushdef([ac_cpp], ac_build_cpp)dnl |
| pushdef([ac_compile], ac_build_compile)dnl |
| pushdef([ac_link], ac_build_link)dnl |
| |
| dnl Defeat the anti-duplication mechanism |
| dnl |
| dnl undefine([AC_PROVIDE_AC_PROG_CPP])dnl |
| dnl undefine([AC_PROVIDE_AC_PROG_C])dnl |
| dnl undefine([AC_PROVIDE_AC_EXEEXT])dnl |
| |
| AC_PROG_CC |
| AC_PROG_CPP |
| AC_EXEEXT |
| |
| dnl Restore the old definitions |
| dnl |
| popdef([AC_TRY_COMPILER])dnl |
| popdef([ac_link])dnl |
| popdef([ac_compile])dnl |
| popdef([ac_cpp])dnl |
| popdef([ac_cv_host_os])dnl |
| popdef([ac_cv_host_vendor])dnl |
| popdef([ac_cv_host_cpu])dnl |
| popdef([ac_cv_host_alias])dnl |
| popdef([ac_cv_host])dnl |
| popdef([host_os])dnl |
| popdef([host_vendor])dnl |
| popdef([host_cpu])dnl |
| popdef([host_alias])dnl |
| popdef([host])dnl |
| popdef([CPPFLAGS])dnl |
| popdef([CFLAGS])dnl |
| popdef([CPP])dnl |
| popdef([CC])dnl |
| popdef([ac_objext])dnl |
| popdef([ac_exeext])dnl |
| popdef([ac_cv_objext])dnl |
| popdef([ac_cv_exeext])dnl |
| popdef([ac_cv_prog_cc_g])dnl |
| popdef([ac_cv_prog_cc_works])dnl |
| popdef([ac_cv_prog_cc_cross])dnl |
| popdef([ac_cv_prog_gcc])dnl |
| popdef([ac_cv_prog_CPP])dnl |
| popdef([cross_compiling])dnl |
| |
| dnl Finally, set Makefile variables |
| dnl |
| BUILD_EXEEXT=$ac_build_exeext |
| BUILD_OBJEXT=$ac_build_objext |
| AC_SUBST(BUILD_EXEEXT)dnl |
| AC_SUBST(BUILD_OBJEXT)dnl |
| AC_SUBST([CFLAGS_FOR_BUILD])dnl |
| AC_SUBST([CPPFLAGS_FOR_BUILD])dnl |
| ]) |
