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2532fa21a9
- This currently just moves over all of the behavior from LLVM. Eventually all of the configure checks that are directly needed by the LLVM build setup should probably go away, and the project should manage their own configuration checks if necessary. - This is the 1st half of this work, the actual Makefile.common hasn't moved over yet. I've tried to stage this in such a way that incremental builds will properly reconfigure for most active developers (the Makefiles don't handle reconfiguring in a perfectly reliable way, and I haven't found an easy way to make them do so). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142456 91177308-0d34-0410-b5e6-96231b3b80d8
18 lines
497 B
Plaintext
18 lines
497 B
Plaintext
#
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# Some Linux machines run a 64-bit kernel with a 32-bit userspace. 'uname -m'
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# shows these as x86_64. Ask the system 'gcc' what it thinks.
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#
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AC_DEFUN([AC_IS_LINUX_MIXED],
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[AC_CACHE_CHECK(for 32-bit userspace on 64-bit system,llvm_cv_linux_mixed,
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[ AC_LANG_PUSH([C])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
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[[#ifndef __x86_64__
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error: Not x86-64 even if uname says so!
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#endif
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]])],
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[llvm_cv_linux_mixed=no],
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[llvm_cv_linux_mixed=yes])
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AC_LANG_POP([C])
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])
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])
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