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| author | Dave Korn <dave.korn.cygwin@gmail.com> | 2009-11-30 23:22:04 +0000 |
|---|---|---|
| committer | Dave Korn <davek@gcc.gnu.org> | 2009-11-30 23:22:04 +0000 |
| commit | f7e413e2d4d7024c6410c82503cd89d156a1807e (patch) | |
| tree | 9471c38454c458137ad85815b86a55469917bef7 /gcc/configure | |
| parent | 9c39ceab1a91f8f95ec0b44e1388832e6f91e0d3 (diff) | |
| download | gcc-f7e413e2d4d7024c6410c82503cd89d156a1807e.zip gcc-f7e413e2d4d7024c6410c82503cd89d156a1807e.tar.gz gcc-f7e413e2d4d7024c6410c82503cd89d156a1807e.tar.bz2 | |
configure.ac (USE_CYGWIN_LIBSTDCXX_WRAPPERS): Define to reflect status of AC_CHECK_FUNC for Cygwin DLL libstdc++ support wrappers.
gcc/ChangeLog:
2009-11-30 Dave Korn <dave.korn.cygwin@gmail.com>
* configure.ac (USE_CYGWIN_LIBSTDCXX_WRAPPERS): Define to reflect
status of AC_CHECK_FUNC for Cygwin DLL libstdc++ support wrappers.
* configure: Regenerate.
* config.in: Regenerate.
* config/i386/cygwin.h (CXX_WRAP_SPEC_LIST): Define list of --wrap
options for Cygwin DLL libstdc++ support wrappers.
(CXX_WRAP_SPEC_OPT): Define spec to use wrappers or not by default
according to defined value of USE_CYGWIN_LIBSTDCXX_WRAPPERS.
(CXX_WRAP_SPEC): Define entire wrapper spec in or out according to
whether USE_CYGWIN_LIBSTDCXX_WRAPPERS is even defined or not.
(LINK_SPEC): Include CXX_WRAP_SPEC.
* gcc/config/i386/winnt.c (wrapper_strcmp): New qsort helper function.
(i386_find_on_wrapper_list): Check if a function is found on the list
of libstdc++ wrapper options.
(i386_pe_file_end): If we are importing a wrapped function, also emit
an external declaration for the real version.
* config/i386/cygming.opt (muse-libstdc-wrappers): New option for
Cygwin targets. Update copyright year.
libstdc++-v3/ChangeLog:
2009-11-30 Dave Korn <dave.korn.cygwin@gmail.com>
* libstdc++-v3/acinclude.m4 (GLIBCXX_ENABLE_SYMVERS): Don't disable
on PE targets.
* libstdc++-v3/configure: Regenerate.
* libstdc++-v3/configure.host: Add libtool DLL options for Cygwin
and MinGW platforms.
* libstdc++-v3/include/bits/c++config (_GLIBCXX_VISIBILITY_ATTR): On
platforms that don't support visibility, allow them to declare a macro
_GLIBCXX_PSEUDO_VISIBILITY that is applied in place of visibility.
(_GLIBCXX_PSEUDO_VISIBILITY): Supply empty default if not declared by
CPU- or OS-specific headers.
* libstdc++-v3/config/os/newlib/os_defines.h
(_GLIBCXX_PSEUDO_VISIBILITY_default): New macro for dllimport.
(_GLIBCXX_PSEUDO_VISIBILITY_hidden): New empty macro.
(_GLIBCXX_PSEUDO_VISIBILITY): Evaluate to one of the above.
* libstdc++-v3/config/os/mingw32/os_defines.h
(_GLIBCXX_PSEUDO_VISIBILITY_default,
_GLIBCXX_PSEUDO_VISIBILITY_hidden,
_GLIBCXX_PSEUDO_VISIBILITY): Likewise.
From-SVN: r154853
Diffstat (limited to 'gcc/configure')
| -rwxr-xr-x | gcc/configure | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/configure b/gcc/configure index f49cdb7..abf0b9a 100755 --- a/gcc/configure +++ b/gcc/configure @@ -22699,6 +22699,32 @@ fi i[34567]86-*-* | x86_64-*-*) case $target_os in + cygwin*) + # Full C++ conformance when using a shared libstdc++-v3 requires some + # support from the Cygwin DLL, which in more recent versions exports + # wrappers to aid in interposing and redirecting operators new, delete, + # etc., as per n2800 #17.6.4.6 [replacement.functions]. Check if we + # are configuring for a version of Cygwin that exports the wrappers. + if test x$host = x$target; then + ac_fn_c_check_func "$LINENO" "__wrap__Znaj" "ac_cv_func___wrap__Znaj" +if test "x$ac_cv_func___wrap__Znaj" = x""yes; then : + gcc_ac_cygwin_dll_wrappers=yes +else + gcc_ac_cygwin_dll_wrappers=no +fi + + else + # Can't check presence of libc functions during cross-compile, so + # we just have to assume we're building for an up-to-date target. + gcc_ac_cygwin_dll_wrappers=yes + fi + +cat >>confdefs.h <<_ACEOF +#define USE_CYGWIN_LIBSTDCXX_WRAPPERS `if test $gcc_ac_cygwin_dll_wrappers = yes; then echo 1; else echo 0; fi` +_ACEOF + + esac + case $target_os in cygwin* | pe | mingw32*) # Recent binutils allows the three-operand form of ".comm" on PE. This # definition is used unconditionally to initialise the default state of |