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| author | jan.nijtmans <nijtmans@users.sourceforge.net> | 2012-03-30 15:12:06 (GMT) |
|---|---|---|
| committer | jan.nijtmans <nijtmans@users.sourceforge.net> | 2012-03-30 15:12:06 (GMT) |
| commit | 82f09d74956b7cd53fb289d631cd52b2a595da96 (patch) | |
| tree | 550831700714e0ace7a604f0bf0ecde89410f223 /unix/tcl.m4 | |
| parent | b0f6c7757ff6565314d49f69fe45427c6bbda8d7 (diff) | |
| parent | 49df110769eec89b42d4f354d37bc4762b2d07de (diff) | |
| download | tk-82f09d74956b7cd53fb289d631cd52b2a595da96.zip tk-82f09d74956b7cd53fb289d631cd52b2a595da96.tar.gz tk-82f09d74956b7cd53fb289d631cd52b2a595da96.tar.bz2 | |
[Bug 3511806] Compiler checks too early
(autoconf still to be run!)
Diffstat (limited to 'unix/tcl.m4')
| -rw-r--r-- | unix/tcl.m4 | 38 |
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. |