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MDEV-7398 mysqld segfaults on FreeBSD 10.1 i386 when built with clang 3.4

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in cmake tests let's treat clang like gcc (same options,
same builtins) in many cases.

* don't check the compiler when
  * testing for -fvisibility=hidden support
  * testing for HAVE_ABI_CXA_DEMANGLE
  * testing for HAVE_GCC_ATOMIC_BUILTINS
  * when removing options with string(replace)
  * when running ${CC} --version (ignore the error instead)
* run ABI checks for clang
* use "canonical" gcc flags for clang
* fix groonga too

Also:

* add cmake detection for gcc __atomic_* builtins. they might be
  supported (__ATOMIC_SEQ_CST is defined), but not for all operand
  sizes. In particular, 64-bit atomic load is problematic on i386
* cache check results for Windows
* remove the test for HAVE_CXXABI_H (HAVE_ABI_CXA_DEMANGLE is
  suffifient)
This commit is contained in:
Sergei Golubchik
2015-06-08 21:06:56 +02:00
parent 7bfda275a1
commit 66fd45afce
12 changed files with 40 additions and 46 deletions
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8
cmake/libutils.cmake
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@ -308,17 +308,15 @@ INCLUDE(CheckCCompilerFlag)
SET(VISIBILITY_HIDDEN_FLAG)
IF(CMAKE_COMPILER_IS_GNUCXX AND UNIX)
IF(CMAKE_C_COMPILER_ID MATCHES "SunPro")
SET(VISIBILITY_HIDDEN_FLAG "-xldscope=hidden")
ELSEIF(UNIX)
CHECK_C_COMPILER_FLAG("-fvisibility=hidden" HAVE_VISIBILITY_HIDDEN)
IF(HAVE_VISIBILITY_HIDDEN)
SET(VISIBILITY_HIDDEN_FLAG "-fvisibility=hidden")
ENDIF()
ENDIF()
IF(CMAKE_C_COMPILER_ID MATCHES "SunPro")
SET(VISIBILITY_HIDDEN_FLAG "-xldscope=hidden")
ENDIF()
# We try to hide the symbols in yassl/zlib to avoid name clashes with
# other libraries like openssl.
FUNCTION(RESTRICT_SYMBOL_EXPORTS target)