Bug 24294 – ImportC: unrecognized command line option -Wno-builtin-macro-redefined with gcc

With GCC 4.3.2 installed using the ImportC feature (example in issue #24293) fails: $ dmd xmysqltest1.d cc1: error: unrecognized command line option "-Wno-builtin-macro-redefined" xmysqltest1.d(2): Error: C preprocess command cpp failed for file cmysql.c, exit status 1 GCC 4.6.4 and higher support the requested switch.

Not sure what to do about this. compiler/src/dmd/link.d adds this switch, as it is necessary in order for druntime/src/importc.h to do its job.

(In reply to Walter Bright from comment #1) > Not sure what to do about this. compiler/src/dmd/link.d adds this switch, as > it is necessary in order for druntime/src/importc.h to do its job. GCC: Put a note into the documentation that this switch is used and that a certain GCC version is required. It is in GCC since 2008 [1], but I could not find the exact GCC version number. How is the problem solved with other compilers (clang, msvc)? [1] https://gcc.gnu.org/legacy-ml/gcc-patches/2008-07/msg02321.html

Thanks for your help with this!

@WalterBright created dlang/dlang.org pull request #3751 "fix Issue 24294 - ImportC: unrecognized command line option -Wno-buil…" fixing this issue: - fix Issue 24294 - ImportC: unrecognized command line option -Wno-builtin-macro-redefined with gcc https://github.com/dlang/dlang.org/pull/3751

dlang/dlang.org pull request #3751 "fix Issue 24294 - ImportC: unrecognized command line option -Wno-buil…" was merged into master: - eadcaa3aad76bbf3046d7669c53307a304b71f40 by Walter Bright: fix Issue 24294 - ImportC: unrecognized command line option -Wno-builtin-macro-redefined with gcc https://github.com/dlang/dlang.org/pull/3751