diff options
| author | Stephan Bergmann <sbergman@redhat.com> | 2020-09-09 14:17:37 +0200 |
|---|---|---|
| committer | Stephan Bergmann <sbergman@redhat.com> | 2020-09-09 16:47:29 +0200 |
| commit | ad6ef813e9d745d44719dae381d64cdcc2f82719 (patch) | |
| tree | 9011ec2b3d1f20a4e97e53ec8eae38c3f27b4d61 /configure.ac | |
| parent | 20d06c7c3e25e486d013049ed817d66be1bcb4af (diff) | |
Guard against some GCC consteval bug
...that caused CustomTarget_idlc/parser_test to fail with recent GCC and
--with-latest-c++ with
> workdir/CustomTarget/idlc/parser_test/in.idl:2 [26:26] : illegal redefinition in scope 'comsunstaruno', 'comsunstarunoXInterface'
> instdir/sdk/bin/idlc: detected 1 errors
> instdir/sdk/bin/idlc Version 1.1
>
> Compiling: workdir/CustomTarget/idlc/parser_test/in.idl
> "constructor.tests 20" expected SUCCESS, got 1 (256): FAILED!
because
> const OStringLiteral sGlobal("::");
in idlc/source/astdeclaration.cxx is apparently not initialized properly when
the OStringLiteral ctor is marked as consteval. (See the linked GCC bug report
for further details.)
Change-Id: I44c547fb990c9b13d86b990199ae93e9fbe9d156
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/102318
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index d97b10fff15b..bfa0d28e5969 100644 --- a/configure.ac +++ b/configure.ac @@ -6802,12 +6802,20 @@ if test "$GCC" = yes; then fi AC_SUBST([HAVE_GCC_FNO_SIZED_DEALLOCATION]) -AC_MSG_CHECKING([whether $CXX_BASE supports C++20 consteval]) +AC_MSG_CHECKING([whether $CXX_BASE supports a working C++20 consteval]) +dnl ...that does not suffer from <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96994> "Missing code +dnl from consteval constructor initializing const variable": AC_LANG_PUSH([C++]) save_CXXFLAGS=$CXXFLAGS CXXFLAGS="$CXXFLAGS $CXXFLAGS_CXX11" -AC_COMPILE_IFELSE([AC_LANG_SOURCE([ - consteval int f() { return 0; } +AC_RUN_IFELSE([AC_LANG_PROGRAM([ + struct S { + consteval S() { i = 1; } + int i = 0; + }; + S const s; + ], [ + return (s.i == 1) ? 0 : 1; ])], [ AC_DEFINE([HAVE_CPP_CONSTEVAL],[1]) AC_MSG_RESULT([yes]) |