Add `need-declaration.m4'.

* Makefile.am (MACROS): Add `need-declaration.m4'.

* gnome-support.m4 (AC_REPLACE_FUNCS): Add memmove, strtod,
strtol, strtoul.
(GCC_NEED_DECLARATIONS): New check.  Check whether `gethostname'
needs to be declared.

* need-declaration.m4: New file.  Stolen from EGCS.

svn path=/trunk/; revision=281

4 files changed, 71 insertions, 12 deletions

diff --git a/macros/ChangeLog b/macros/ChangeLog
index 73dce0126f..bd76fc01fd 100644
--- a/macros/ChangeLog
+++ b/macros/ChangeLog
@@ -1,3 +1,14 @@
+1998-07-15  Raja R Harinath  <harinath@cs.umn.edu>
+
+	* Makefile.am (MACROS): Add `need-declaration.m4'.
+
+	* gnome-support.m4 (AC_REPLACE_FUNCS): Add memmove, strtod,
+	strtol, strtoul.
+	(GCC_NEED_DECLARATIONS): New check.  Check whether `gethostname'
+	needs to be declared.
+
+	* need-declaration.m4: New file.  Stolen from EGCS.
+
 1998-07-13  Raja R Harinath  <harinath@cs.umn.edu>
 
 	* gnome-support.m4 (AC_REPLACE_FUNCS): Add check for `mkstemp'.
diff --git a/macros/Makefile.am b/macros/Makefile.am
index 5d1b1e378b..28dc457462 100644
--- a/macros/Makefile.am
+++ b/macros/Makefile.am
@@ -1,16 +1,17 @@
 ## Please update this variable if any new macros are created
-MACROS= 					\
+MACROS=						\
   aclocal-include.m4				\
-  curses.m4 					\
-  gnome-fileutils.m4 				\
+  curses.m4					\
+  gnome-fileutils.m4				\
   gnome-guile-checks.m4				\
-  gnome-libgtop-check.m4 			\
-  gnome-libgtop-sysdeps.m4 			\
+  gnome-libgtop-check.m4			\
+  gnome-libgtop-sysdeps.m4			\
   gnome-objc-checks.m4				\
-  gnome-pthread-check.m4 			\
-  gnome-support.m4 				\
-  gnome-x-checks.m4 				\
-  gnome.m4
+  gnome-pthread-check.m4			\
+  gnome-support.m4				\
+  gnome-x-checks.m4				\
+  gnome.m4					\
+  need-declaration.m4
 
 EXTRA_DIST=$(MACROS) autogen.sh macros.dep
 MAINTAINERCLEANFILES=macros.dep
diff --git a/macros/gnome-support.m4 b/macros/gnome-support.m4
index 738c175a41..7d5fdbe1b1 100644
--- a/macros/gnome-support.m4
+++ b/macros/gnome-support.m4
@@ -78,10 +78,15 @@ AC_DEFUN([GNOME_SUPPORT_CHECKS],[
       LIBOBJS="$LIBOBJS easy-vsnprintf.o",
       LIBOBJS="$LIBOBJS vsnprintf.o")])
 
-  AC_REPLACE_FUNCS(mkstemp scandir strcasecmp strerror strndup strnlen)
-  AC_REPLACE_FUNCS(strtok_r vasprintf)
+  AC_REPLACE_FUNCS(memmove mkstemp scandir strcasecmp strerror strndup strnlen)
+  AC_REPLACE_FUNCS(strtok_r strtod strtol strtoul vasprintf)
 
-  if test "$LIBOBJS" != ""; then
+  # see if we need to declare some functions.  Solaris is notorious for
+  # putting functions into the `libc' but not listing them in the headers
+  AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h)
+  GCC_NEED_DECLARATIONS(gethostname)
+
+  if test "$LIBOBJS$gcc_need_declarations" != ""; then
      need_gnome_support=yes
   fi
   # Turn our LIBOBJS into libtool objects.  This is gross, but it
diff --git a/macros/need-declaration.m4 b/macros/need-declaration.m4
new file mode 100644
index 0000000000..d5b7bc66d5
--- /dev/null
+++ b/macros/need-declaration.m4
@@ -0,0 +1,42 @@
+dnl See whether we need a declaration for a function.
+dnl GCC_NEED_DECLARATION(FUNCTION [, EXTRA-HEADER-FILES])
+AC_DEFUN(GCC_NEED_DECLARATION,
+[AC_MSG_CHECKING([whether $1 must be declared])
+AC_CACHE_VAL(gcc_cv_decl_needed_$1,
+[AC_TRY_COMPILE([
+#include <stdio.h>
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+$2],
+[char *(*pfn) = (char *(*)) $1],
+eval "gcc_cv_decl_needed_$1=no", eval "gcc_cv_decl_needed_$1=yes")])
+if eval "test \"`echo '$gcc_cv_decl_needed_'$1`\" = yes"; then
+  AC_MSG_RESULT(yes)
+  gcc_need_declarations="$gcc_need_declarations $1"
+  gcc_tr_decl=NEED_DECLARATION_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  AC_DEFINE_UNQUOTED($gcc_tr_decl)
+else
+  AC_MSG_RESULT(no)
+fi
+])dnl
+
+dnl Check multiple functions to see whether each needs a declaration.
+dnl GCC_NEED_DECLARATIONS(FUNCTION... [, EXTRA-HEADER-FILES])
+AC_DEFUN(GCC_NEED_DECLARATIONS,
+[for ac_func in $1
+do
+GCC_NEED_DECLARATION($ac_func, $2)
+done
+]
+)