diff options
| author | Robin Haberkorn <rhaberkorn@fmsbw.de> | 2025-10-20 00:02:34 +0200 |
|---|---|---|
| committer | Robin Haberkorn <rhaberkorn@fmsbw.de> | 2025-10-20 00:02:34 +0200 |
| commit | 243a3be9185412a5a29ba189c77569fa96c85e89 (patch) | |
| tree | b5aaa8ec1820262392676ad64474efd18982efe3 /configure.ac | |
| parent | f223cfada825d87dcab393611f604b8014f2b172 (diff) | |
scintilla: use AX_PTRDIFF_ALIASES_INT to check whether ptrdiff_t aliases int
* Scintilla had build problems if ptrdiff_t doesn't alias int if it has the
same storage size (e.g. on NetBSD 10 (armv6)).
* Unfortunately, Neil Hodgson refused to merge my previous Scintilla patches that
would have fixed the issue at the core.
See https://groups.google.com/g/scintilla-interest/c/STAv6LgLyCo
* He only agreed to introducing a separate flag to work around the issue
(`-DPTRDIFF_DOESNT_ALIAS_INT`).
* In order to continue to support all standard C/C++ conforming platforms
we therefore need a compile-time check to check for the aliasability
of ptrdiff_t and int.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 9d5f74d..c0e9939 100644 --- a/configure.ac +++ b/configure.ac @@ -101,6 +101,13 @@ AC_PROG_CXX([c++ g++ clang++]) AX_CXX_COMPILE_STDCXX(17, noext, mandatory) AC_CHECK_TOOL(AR, ar) +# If ptrdiff_t does not alias int, we need a workaround +# in Scintilla. +AX_PTRDIFF_ALIASES_INT +if [[ "x$ax_cv_ptrdiff_aliases_int" = "xno" ]]; then + SCINTILLA_CXXFLAGS="$SCINTILLA_CXXFLAGS -DPTRDIFF_DOESNT_ALIAS_INT" +fi + # Whether $CC is Clang AM_CONDITIONAL(CLANG, [$CC --version | $GREP -i clang >/dev/null]) |