From 4b30f059a8862f77079033a74b10f2522d7cc460 Mon Sep 17 00:00:00 2001
From: escoffon <escoffon>
Date: Wed, 22 Jul 1998 13:39:28 +0000
Subject: Added support for specifying warning flags for the compiler, with
 checks for gcc and appropriate defaults.

---
 unix/Makefile.in  | 6 +++++-
 unix/configure.in | 8 ++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/unix/Makefile.in b/unix/Makefile.in
index 63a56a5..0b3989d 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -84,6 +84,9 @@ TCL_BIN_DIR =		@TCL_BIN_DIR@
 # Libraries built with optimization switches have this additional extension
 DBGX =			@DBGX@
 
+# warning flags
+CFLAGS_WARNING =	@CFLAGS_WARNING@
+
 # The default switches for optimization or debugging
 CFLAGS_DEBUG =		@CFLAGS_DEBUG@
 CFLAGS_OPTIMIZE =	@CFLAGS_OPTIMIZE@
@@ -200,7 +203,8 @@ TOOL_DIR =		@TCL_SRC_DIR@/tools
 
 
 CC =		@CC@
-CC_SWITCHES =	${CFLAGS} ${TK_SHLIB_CFLAGS} -I${UNIX_DIR} -I${GENERIC_DIR} \
+CC_SWITCHES =	${CFLAGS} ${CFLAGS_WARNING} ${TK_SHLIB_CFLAGS} \
+-I${UNIX_DIR} -I${GENERIC_DIR} \
 -I${BMAP_DIR} -I${TCL_GENERIC_DIR} ${X11_INCLUDES} ${AC_FLAGS} ${PROTO_FLAGS} \
 ${SECURITY_FLAGS} ${MEM_DEBUG_FLAGS} ${KEYSYM_FLAGS}
 
diff --git a/unix/configure.in b/unix/configure.in
index 54c897f..5579147 100644
--- a/unix/configure.in
+++ b/unix/configure.in
@@ -30,6 +30,13 @@ fi
 AC_C_CROSS
 AC_HAVE_HEADERS(unistd.h limits.h)
 
+# set the warning flags depending on whether or not we are using gcc
+if test "${GCC}" = "yes" ; then
+    CFLAGS_WARNING="-Wall -Wconversion"
+else
+    CFLAGS_WARNING=""
+fi
+
 #--------------------------------------------------------------------
 #	See if there was a command-line option for where Tcl is;  if
 #	not, assume that its top-level directory is a sibling of ours.
@@ -394,6 +401,7 @@ TK_LIB_SPEC="-L${exec_prefix}/lib \${TK_LIB_FLAG}"
 AC_SUBST(CFLAGS_DEBUG)
 AC_SUBST(CFLAGS_DEFAULT)
 AC_SUBST(CFLAGS_OPTIMIZE)
+AC_SUBST(CFLAGS_WARNING)
 AC_SUBST(DBGX)
 AC_SUBST(DL_LIBS)
 AC_SUBST(LD_FLAGS)
-- 
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