config/ac_prog_cc_for_build.m4

   1 dnl Available from the GNU Autoconf Macro Archive at:
   2 dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_prog_cc_for_build.html
   3 dnl
   4 AC_DEFUN([AC_PROG_CC_FOR_BUILD], [dnl
   5 AC_REQUIRE([AC_PROG_CC])dnl
   6 AC_REQUIRE([AC_PROG_CPP])dnl
   7 AC_REQUIRE([AC_EXEEXT])dnl
   8 AC_REQUIRE([AC_CANONICAL_SYSTEM])dnl
   9 dnl
  10 pushdef([AC_TRY_COMPILER], [
  11 cat > conftest.$ac_ext << EOF
  12 #line __oline__ "configure"
  13 #include "confdefs.h"
  14 [$1]
  15 EOF
  16 # If we can't run a trivial program, we are probably using a cross
  17 compiler.
  18 # Fail miserably.
  19 if AC_TRY_EVAL(ac_link) && test -s conftest${ac_exeext} && (./conftest;
  20 exit) 2>/dev/null; then
  21   [$2]=yes
  22 else
  23   echo "configure: failed program was:" >&AC_FD_CC
  24   cat conftest.$ac_ext >&AC_FD_CC
  25   [$2]=no
  26 fi
  27 [$3]=no
  28 rm -fr conftest*])dnl
  29
  30 dnl Use the standard macros, but make them use other variable names
  31 dnl
  32 pushdef([cross_compiling], [#])dnl
  33 pushdef([ac_cv_prog_CPP], ac_cv_build_prog_CPP)dnl
  34 pushdef([ac_cv_prog_gcc], ac_cv_build_prog_gcc)dnl
  35 pushdef([ac_cv_prog_cc_works], ac_cv_build_prog_cc_works)dnl
  36 pushdef([ac_cv_prog_cc_cross], ac_cv_build_prog_cc_cross)dnl
  37 pushdef([ac_cv_prog_cc_g], ac_cv_build_prog_cc_g)dnl
  38 pushdef([ac_cv_exeext], ac_cv_build_exeext)dnl
  39 pushdef([ac_cv_objext], ac_cv_build_objext)dnl
  40 pushdef([ac_exeext], ac_build_exeext)dnl
  41 pushdef([ac_objext], ac_build_objext)dnl
  42 pushdef([CC], CC_FOR_BUILD)dnl
  43 pushdef([CPP], CPP_FOR_BUILD)dnl
  44 pushdef([CFLAGS], CFLAGS_FOR_BUILD)dnl
  45 pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl
  46 pushdef([host], build)dnl
  47 pushdef([host_alias], build_alias)dnl
  48 pushdef([host_cpu], build_cpu)dnl
  49 pushdef([host_vendor], build_vendor)dnl
  50 pushdef([host_os], build_os)dnl
  51 pushdef([ac_cv_host], ac_cv_build)dnl
  52 pushdef([ac_cv_host_alias], ac_cv_build_alias)dnl
  53 pushdef([ac_cv_host_cpu], ac_cv_build_cpu)dnl
  54 pushdef([ac_cv_host_vendor], ac_cv_build_vendor)dnl
  55 pushdef([ac_cv_host_os], ac_cv_build_os)dnl
  56 pushdef([ac_cpp], ac_build_cpp)dnl
  57 pushdef([ac_compile], ac_build_compile)dnl
  58 pushdef([ac_link], ac_build_link)dnl
  59
  60 dnl dnl Defeat the anti-duplication mechanism
  61 dnl dnl
  62 dnl undefine([AC_PROVIDE_AC_PROG_CPP])dnl
  63 dnl undefine([AC_PROVIDE_AC_PROG_C])dnl
  64 dnl undefine([AC_PROVIDE_AC_EXEEXT])dnl
  65
  66 AC_PROG_CC
  67 AC_PROG_CPP
  68 AC_EXEEXT
  69
  70 dnl Restore the old definitions
  71 dnl
  72 popdef([AC_TRY_COMPILER])dnl
  73 popdef([ac_link])dnl
  74 popdef([ac_compile])dnl
  75 popdef([ac_cpp])dnl
  76 popdef([ac_cv_host_os])dnl
  77 popdef([ac_cv_host_vendor])dnl
  78 popdef([ac_cv_host_cpu])dnl
  79 popdef([ac_cv_host_alias])dnl
  80 popdef([ac_cv_host])dnl
  81 popdef([host_os])dnl
  82 popdef([host_vendor])dnl
  83 popdef([host_cpu])dnl
  84 popdef([host_alias])dnl
  85 popdef([host])dnl
  86 popdef([CPPFLAGS])dnl
  87 popdef([CFLAGS])dnl
  88 popdef([CPP])dnl
  89 popdef([CC])dnl
  90 popdef([ac_objext])dnl
  91 popdef([ac_exeext])dnl
  92 popdef([ac_cv_objext])dnl
  93 popdef([ac_cv_exeext])dnl
  94 popdef([ac_cv_prog_cc_g])dnl
  95 popdef([ac_cv_prog_cc_works])dnl
  96 popdef([ac_cv_prog_cc_cross])dnl
  97 popdef([ac_cv_prog_gcc])dnl
  98 popdef([cross_compiling])dnl
  99
 100 dnl Finally, set Makefile variables
 101 dnl
 102 BUILD_EXEEXT=$ac_build_exeext
 103 BUILD_OBJEXT=$ac_build_objext
 104 AC_SUBST(BUILD_EXEEXT)dnl
 105 AC_SUBST(BUILD_OBJEXT)dnl
 106 AC_SUBST([CFLAGS_FOR_BUILD])dnl
 107 AC_SUBST([CPPFLAGS_FOR_BUILD])dnl
 108 ])