acinclude.m4 ((GLIBCPP_CHECK_MATH_SUPPORT): Revert last change.

2000-06-19  Benjamin Kosnik  <bkoz@soma.redhat.com>

	* acinclude.m4 ((GLIBCPP_CHECK_MATH_SUPPORT): Revert last change.
	Add -Werror-implicit-function-declaration instead.

	Regenerate with fixed maintainer-tools.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* libio/Makefile.in: Regenerate.

From-SVN: r34614

libstdc++-v3/ChangeLog

 2000-06-19  Benjamin Kosnik  <bkoz@soma.redhat.com>
 
+	* acinclude.m4 ((GLIBCPP_CHECK_MATH_SUPPORT): Revert last change.
+	Add -Werror-implicit-function-declaration instead.
+
 	Regenerate with fixed maintainer-tools.
 	* aclocal.m4: Regenerate.
 	* configure: Regenerate.

libstdc++-v3/acinclude.m4

@@ -900,14 +900,10 @@ dnl Define HAVE_CARGF etc if "cargf" is found.
 dnl
 dnl GLIBCPP_CHECK_MATH_SUPPORT
 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
-
-  dnl NB: Can't use AC_LANG_CPLUSPLUS here, because g++ tries to link
-  dnl in libstdc++, which we are building right now.
-  dnl Yet, we need to use the c++ compiler so that __cplusplus is defined.
-  dnl So, use this.
-#  ac_test_CFLAGS="${CFLAGS+set}"
-#  ac_save_CFLAGS="$CFLAGS"
-#  CFLAGS='-x c++'
+   dnl Work around bug on powerpc compiler
+  ac_test_CFLAGS="${CFLAGS+set}"
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS='-Werror-implicit-function-declaration'
 
   dnl Check libm
   AC_CHECK_LIB(m, sin, libm="-lm")

libstdc++-v3/aclocal.m4

@@ -912,14 +912,10 @@ dnl Define HAVE_CARGF etc if "cargf" is found.
 dnl
 dnl GLIBCPP_CHECK_MATH_SUPPORT
 AC_DEFUN(GLIBCPP_CHECK_MATH_SUPPORT, [
-
-  dnl NB: Can't use AC_LANG_CPLUSPLUS here, because g++ tries to link
-  dnl in libstdc++, which we are building right now.
-  dnl Yet, we need to use the c++ compiler so that __cplusplus is defined.
-  dnl So, use this.
-#  ac_test_CFLAGS="${CFLAGS+set}"
-#  ac_save_CFLAGS="$CFLAGS"
-#  CFLAGS='-x c++'
+   dnl Work around bug on powerpc compiler
+  ac_test_CFLAGS="${CFLAGS+set}"
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS='-Werror-implicit-function-declaration'
 
   dnl Check libm
   AC_CHECK_LIB(m, sin, libm="-lm")