[autoconf] update ax_prog_cc_for_build.m4

update scripts/m4/ax_prog_cc_for_build.m4 from serial 8 to serial 18

https://www.gnu.org/software/autoconf-archive/ax_prog_cc_for_build.html
http://git.savannah.gnu.org/gitweb/?p=autoconf-archive.git;a=blob_plain;f=m4/ax_prog_cc_for_build.m4

1 files changed, 34 insertions, 20 deletions

diff --git a/scripts/m4/ax_prog_cc_for_build.m4 b/scripts/m4/ax_prog_cc_for_build.m4
index 77fd346a..f7410d74 100644
--- a/scripts/m4/ax_prog_cc_for_build.m4
+++ b/scripts/m4/ax_prog_cc_for_build.m4
@@ -1,5 +1,5 @@
 # ===========================================================================
-#   http://www.gnu.org/software/autoconf-archive/ax_prog_cc_for_build.html
+#   https://www.gnu.org/software/autoconf-archive/ax_prog_cc_for_build.html
 # ===========================================================================
 #
 # SYNOPSIS
@@ -32,31 +32,35 @@
 #   and this notice are preserved. This file is offered as-is, without any
 #   warranty.
 
-#serial 8
+#serial 18
 
 AU_ALIAS([AC_PROG_CC_FOR_BUILD], [AX_PROG_CC_FOR_BUILD])
 AC_DEFUN([AX_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_HOST])dnl
+AC_REQUIRE([AC_CANONICAL_BUILD])dnl
 
 dnl Use the standard macros, but make them use other variable names
 dnl
 pushdef([ac_cv_prog_CPP], ac_cv_build_prog_CPP)dnl
+pushdef([ac_cv_prog_cc_c89], ac_cv_build_prog_cc_c89)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_c_compiler_gnu], ac_cv_build_c_compiler_gnu)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([GCC], GCC_FOR_BUILD)dnl
 pushdef([CFLAGS], CFLAGS_FOR_BUILD)dnl
 pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl
+pushdef([EXEEXT], BUILD_EXEEXT)dnl
 pushdef([LDFLAGS], LDFLAGS_FOR_BUILD)dnl
+pushdef([OBJEXT], BUILD_OBJEXT)dnl
 pushdef([host], build)dnl
 pushdef([host_alias], build_alias)dnl
 pushdef([host_cpu], build_cpu)dnl
@@ -67,27 +71,29 @@ 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
+pushdef([ac_tool_prefix], ac_build_tool_prefix)dnl
+pushdef([am_cv_CC_dependencies_compiler_type], am_cv_build_CC_dependencies_compiler_type)dnl
+pushdef([am_cv_prog_cc_c_o], am_cv_build_prog_cc_c_o)dnl
+pushdef([cross_compiling], cross_compiling_build)dnl
 
-save_cross_compiling=$cross_compiling
-save_ac_tool_prefix=$ac_tool_prefix
-cross_compiling=no
-ac_tool_prefix=
+cross_compiling_build=no
 
+ac_build_tool_prefix=
+AS_IF([test -n "$build"],      [ac_build_tool_prefix="$build-"],
+      [test -n "$build_alias"],[ac_build_tool_prefix="$build_alias-"])
+
+AC_LANG_PUSH([C])
 AC_PROG_CC
+_AC_COMPILER_EXEEXT
+_AC_COMPILER_OBJEXT
 AC_PROG_CPP
-AC_EXEEXT
-
-ac_tool_prefix=$save_ac_tool_prefix
-cross_compiling=$save_cross_compiling
 
 dnl Restore the old definitions
 dnl
-popdef([ac_link])dnl
-popdef([ac_compile])dnl
-popdef([ac_cpp])dnl
+popdef([cross_compiling])dnl
+popdef([am_cv_prog_cc_c_o])dnl
+popdef([am_cv_CC_dependencies_compiler_type])dnl
+popdef([ac_tool_prefix])dnl
 popdef([ac_cv_host_os])dnl
 popdef([ac_cv_host_vendor])dnl
 popdef([ac_cv_host_cpu])dnl
@@ -98,25 +104,33 @@ popdef([host_vendor])dnl
 popdef([host_cpu])dnl
 popdef([host_alias])dnl
 popdef([host])dnl
+popdef([OBJEXT])dnl
 popdef([LDFLAGS])dnl
+popdef([EXEEXT])dnl
 popdef([CPPFLAGS])dnl
 popdef([CFLAGS])dnl
+popdef([GCC])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_c_compiler_gnu])dnl
 popdef([ac_cv_prog_cc_g])dnl
 popdef([ac_cv_prog_cc_cross])dnl
 popdef([ac_cv_prog_cc_works])dnl
+popdef([ac_cv_prog_cc_c89])dnl
 popdef([ac_cv_prog_gcc])dnl
 popdef([ac_cv_prog_CPP])dnl
 
+dnl restore global variables ac_ext, ac_cpp, ac_compile,
+dnl ac_link, ac_compiler_gnu (dependant on the current
+dnl language after popping):
+AC_LANG_POP([C])
+
 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