Make sure AC_LIBTOOL_SETUP is called before any macros that set

the autoconf test language (e.g. AC_LANG_CPLUSPLUS).  Autoconf's
AC_EXEEXT macro only works for C compilers.  AC_EXEEXT gets
confused and thinks that an extension such as the C++ source file
extenstion ".C" is an executable file extension, which screws up
the libtool configuration.

Pass the same autoconf variables used in the main ltconfig run to
the ltconfig configuration tag run (with the exception of a few).
This probably isn't necessary but I think it is a good idea to do
so.

diff --git a/libtool.m4 b/libtool.m4
index 527f096da0700018b6d2506ee4dccd124b04d483..e46ec05c12a0480ad2f9a9aaae5eff7e9eef39ff 100644 (file)
--- a/libtool.m4
+++ b/libtool.m4
@@ -29,8 +29,8 @@ AC_DEFUN(AC_PROG_LIBTOOL,
 AC_CACHE_SAVE
 
 # Actually configure libtool.  ac_aux_dir is where install-sh is found.
-AR="$AR" CC="$CC" CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS" \
-FILE="$FILE" LTCC="$CC" LD="$LD" LDFLAGS="$LDFLAGS" LIBS="$LIBS" \
+AR="$AR" LTCC="$CC" CC="$CC" CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS" \
+FILE="$FILE" LD="$LD" LDFLAGS="$LDFLAGS" LIBS="$LIBS" \
 LN_S="$LN_S" NM="$NM" RANLIB="$RANLIB" STRIP="$STRIP" \
 AS="$AS" DLLTOOL="$DLLTOOL" OBJDUMP="$OBJDUMP" \
 objext="$OBJEXT" exeext="$EXEEXT" reload_flag="$reload_flag" \
@@ -56,6 +56,13 @@ exec 5>>./config.log
 
 AC_DEFUN(AC_LIBTOOL_SETUP,
 [AC_PREREQ(2.13)dnl
+# Autoconf's AC_EXEEXT macro only works for C compilers.  AC_EXEEXT
+# gets confused and thinks that an extension such as the C++ source
+# file extenstion ".C" is an executable file extension, which screws
+# up the libtool configuration.
+AC_BEFORE([AC_LIBTOOL_SETUP],[AC_LANG_CPLUSPLUS])
+AC_BEFORE([AC_LIBTOOL_SETUP],[AC_LANG_FORTRAN77])
+#
 AC_REQUIRE([AC_ENABLE_SHARED])dnl
 AC_REQUIRE([AC_ENABLE_STATIC])dnl
 AC_REQUIRE([AC_ENABLE_FAST_INSTALL])dnl
@@ -678,9 +685,13 @@ lt_save_CC="$CC"
 lt_save_CFLAGS="$CFLAGS"
 dnl Make sure LTCC is set to the C compiler, i.e. set LTCC before CC
 dnl is set to the C++ compiler.
+AR="$AR" LTCC="$CC" CC="$CXX" CFLAGS="$CXXFLAGS" CPPFLAGS="$CPPFLAGS" \
+FILE="$FILE" LIBS="$LIBS" \
+LN_S="$LN_S" NM="$NM" RANLIB="$RANLIB" STRIP="$STRIP" \
+AS="$AS" DLLTOOL="$DLLTOOL" OBJDUMP="$OBJDUMP" \
+objext="$OBJEXT" exeext="$EXEEXT" \
 deplibs_check_method="$deplibs_check_method" \
 file_magic_cmd="$file_magic_cmd" \
-LTCC="$CC" CC="$CXX" CFLAGS="$CXXFLAGS" \
 ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/ltconfig -o libtool $libtool_flags \
 --build="$build" --add-tag=CXX $ac_aux_dir/ltcf-cxx.sh \
 || AC_MSG_ERROR([libtool tag configuration failed])