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libarchive: Use one architecture for try-compiles 

We use CHECK_TYPE_SIZE in libarchive to check for the existence of some
types.  For universal binary builds on the Mac, the size check can fail
if it is inconsistent across architectures.  However, we do not actually
need the size so it is safe to do the checks for only one architecture.

See issue #9913.
This commit is contained in:
Brad King 2009-11-23 11:30:58 -05:00
parent 1da9b54a59
commit 9e852190b3
1 changed files with 7 additions and 0 deletions
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7
Utilities/cmlibarchive/CMakeLists.txt
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@ -4,6 +4,13 @@ PROJECT(libarchive C)
#
CMAKE_MINIMUM_REQUIRED(VERSION 2.6.1)
SET(CMAKE_MODULE_PATH "${libarchive_SOURCE_DIR}/build/cmake")
# We use CHECK_TYPE_SIZE for existence tests, so use only one arch.
LIST(LENGTH CMAKE_OSX_ARCHITECTURES NUM_ARCHS)
IF(${NUM_ARCHS} GREATER 1)
LIST(GET CMAKE_OSX_ARCHITECTURES 0 CMAKE_TRY_COMPILE_OSX_ARCHITECTURES)
ENDIF()
#
# Version - read from 'version' file.
#