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| author | jan.nijtmans <nijtmans@users.sourceforge.net> | 2012-03-30 12:28:07 (GMT) |
|---|---|---|
| committer | jan.nijtmans <nijtmans@users.sourceforge.net> | 2012-03-30 12:28:07 (GMT) |
| commit | 258e927279e1a28d29a07a1c07ebee9a99890e69 (patch) | |
| tree | 11e210aa0e7919af5650363fb760a2232fb46151 /unix/tcl.m4 | |
| parent | 3c562ea4258e410e880449ac6b65936c62d0cc48 (diff) | |
| parent | 59c52ee2fb7fcc819a92861101a8dd4b77c9f606 (diff) | |
| download | tcl-258e927279e1a28d29a07a1c07ebee9a99890e69.zip tcl-258e927279e1a28d29a07a1c07ebee9a99890e69.tar.gz tcl-258e927279e1a28d29a07a1c07ebee9a99890e69.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 | 36 |
1 files changed, 34 insertions, 2 deletions
diff --git a/unix/tcl.m4 b/unix/tcl.m4 index f6e002e..74a577d 100644 --- a/unix/tcl.m4 +++ b/unix/tcl.m4 @@ -1220,7 +1220,7 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [ CC_SEARCH_FLAGS="" LD_SEARCH_FLAGS="" ;; - CYGWIN_*) + CYGWIN_*|MINGW32*) SHLIB_CFLAGS="" SHLIB_LD='${CC} -shared' SHLIB_SUFFIX=".dll" @@ -1231,6 +1231,19 @@ AC_DEFUN([SC_CONFIG_CFLAGS], [ TCL_NEEDS_EXP_FILE=1 TCL_EXPORT_FILE_SUFFIX='${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" @@ -2058,7 +2071,7 @@ dnl # preprocessing tests use only CPPFLAGS. case $system in AIX-*) ;; BSD/OS*) ;; - CYGWIN_*) ;; + CYGWIN_*|MINGW32_*) ;; IRIX*) ;; NetBSD-*|FreeBSD-*|OpenBSD-*) ;; Darwin-*) ;; @@ -2115,6 +2128,25 @@ dnl # preprocessing tests use only CPPFLAGS. TCL_LIBS="${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. |