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authorjan.nijtmans <nijtmans@users.sourceforge.net>2012-03-30 15:12:06 (GMT)
committerjan.nijtmans <nijtmans@users.sourceforge.net>2012-03-30 15:12:06 (GMT)
commit82f09d74956b7cd53fb289d631cd52b2a595da96 (patch)
tree550831700714e0ace7a604f0bf0ecde89410f223 /unix/tcl.m4
parentb0f6c7757ff6565314d49f69fe45427c6bbda8d7 (diff)
parent49df110769eec89b42d4f354d37bc4762b2d07de (diff)
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[Bug 3511806] Compiler checks too early
(autoconf still to be run!)
Diffstat (limited to 'unix/tcl.m4')
-rw-r--r--unix/tcl.m438
1 files changed, 35 insertions, 3 deletions
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 37c7c74..ca77586 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -1237,17 +1237,30 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [
CC_SEARCH_FLAGS=""
LD_SEARCH_FLAGS=""
;;
- CYGWIN_*)
+ CYGWIN_*|MINGW32*)
SHLIB_CFLAGS=""
SHLIB_LD='${CC} -shared'
SHLIB_SUFFIX=".dll"
- DL_OBJS="tclLoadDl.o"
+ DL_OBJS="tclLoadDl.o tclWinError.o"
DL_LIBS="-ldl"
CC_SEARCH_FLAGS=""
LD_SEARCH_FLAGS=""
TCL_NEEDS_EXP_FILE=1
TCL_EXPORT_FILE_SUFFIX='${VERSION}\$\{DBGX\}.dll.a'
TCL_SHLIB_LD_EXTRAS='-Wl,--out-implib,$[@].a'
+ AC_CACHE_CHECK(for Cygwin version of gcc,
+ ac_cv_cygwin,
+ AC_TRY_COMPILE([
+ #ifdef __CYGWIN__
+ #error cygwin
+ #endif
+ ], [],
+ ac_cv_cygwin=no,
+ ac_cv_cygwin=yes)
+ )
+ if test "$ac_cv_cygwin" = "no"; then
+ AC_MSG_ERROR([${CC} is not a cygwin compiler.])
+ fi
;;
dgux*)
SHLIB_CFLAGS="-K PIC"
@@ -2069,7 +2082,7 @@ dnl # preprocessing tests use only CPPFLAGS.
case $system in
AIX-*) ;;
BSD/OS*) ;;
- CYGWIN_*) ;;
+ CYGWIN_*|MINGW32_*) ;;
IRIX*) ;;
NetBSD-*|FreeBSD-*|OpenBSD-*) ;;
Darwin-*) ;;
@@ -2114,6 +2127,25 @@ dnl # preprocessing tests use only CPPFLAGS.
TCL_LIBS="${DL_LIBS} ${LIBS} ${MATH_LIBS}"])
AC_SUBST(TCL_LIBS)
+ # See if the compiler supports casting to a union type.
+ # This is used to stop gcc from printing a compiler
+ # warning when initializing a union member.
+
+ AC_CACHE_CHECK(for cast to union support,
+ tcl_cv_cast_to_union,
+ AC_TRY_COMPILE([],
+ [
+ union foo { int i; double d; };
+ union foo f = (union foo) (int) 0;
+ ],
+ tcl_cv_cast_to_union=yes,
+ tcl_cv_cast_to_union=no)
+ )
+ if test "$tcl_cv_cast_to_union" = "yes"; then
+ AC_DEFINE(HAVE_CAST_TO_UNION, 1,
+ [Defined when compiler supports casting to union type.])
+ fi
+
# FIXME: This subst was left in only because the TCL_DL_LIBS
# entry in tclConfig.sh uses it. It is not clear why someone
# would use TCL_DL_LIBS instead of TCL_LIBS.