From 80ef9522dd2057a3e9ab86ee92037bff6c931b00 Mon Sep 17 00:00:00 2001
From: "Alan M. Feldstein" <alan@alanfeldstein.com>
Date: Mon, 7 Sep 2009 20:26:10 -0500
Subject: [PATCH] Not all C compilers recognize (or need) -Wall.

---
 configure.in       | 5 +++--
 driver/Makefile.in | 2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/configure.in b/configure.in
index 26ba068da..2ecfec53c 100644
--- a/configure.in
+++ b/configure.in
@@ -49,8 +49,9 @@ AX_WIN32
 #enable_vvp32=no
 AC_SUBST(enable_vvp32)
 
+AC_CHECK_DECL(__SUNPRO_C,AC_SUBST(WARNING_CFLAGS,),AC_SUBST(WARNING_CFLAGS,-Wall))
 
-AC_LANG_CPLUSPLUS
+AC_LANG(C++)
 
 AC_CHECK_HEADERS(getopt.h malloc.h inttypes.h libiberty.h iosfwd sys/wait.h)
 
@@ -92,7 +93,7 @@ AC_SUBST(DLLIB)
 
 AC_PROG_INSTALL
 
-AC_LANG_C
+AC_LANG(C)
 AC_C_BIGENDIAN
 
 # $host
diff --git a/driver/Makefile.in b/driver/Makefile.in
index c96b79d78..69436da73 100644
--- a/driver/Makefile.in
+++ b/driver/Makefile.in
@@ -44,7 +44,7 @@ MAN = @MAN@
 PS2PDF = @PS2PDF@
 
 CPPFLAGS = @ident_support@ -I. -I.. -I$(srcdir)/.. -I$(srcdir) @CPPFLAGS@ @DEFS@
-CFLAGS = -Wall @CFLAGS@
+CFLAGS = @WARNING_CFLAGS@ @CFLAGS@
 LDFLAGS = @LDFLAGS@
 
 all: iverilog@EXEEXT@