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(LIBUNWIND__THREAD): New test.
(Logical change 1.22)
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1 changed files with 26 additions and 7 deletions
33
aclocal.m4
vendored
33
aclocal.m4
vendored
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@ -946,7 +946,7 @@ AC_DEFUN([AM_CONFIG_HEADER],
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m4_ifndef([_AM_Config_Header_Index], m4_define([_AM_Config_Header_Index], [0]))
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dnl prepare to store our destination file list for use in config.status
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AC_FOREACH([_AM_File], [$1],
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[m4_pushdef([_AM_Dest], m4_patsubst(_AM_File, [:.*]))
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[m4_pushdef([_AM_Dest], patsubst(_AM_File, [:.*]))
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m4_define([_AM_Config_Header_Index], m4_incr(_AM_Config_Header_Index))
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dnl and add it to the list of files AC keeps track of, along
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dnl with our hook
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@ -987,12 +987,31 @@ done])
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# -----------------
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# Like AS_DIRNAME, only do it during macro expansion
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AC_DEFUN([_AM_DIRNAME],
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[m4_if(m4_regexp([$1], [^.*[^/]//*[^/][^/]*/*$]), -1,
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m4_if(m4_regexp([$1], [^//\([^/]\|$\)]), -1,
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m4_if(m4_regexp([$1], [^/.*]), -1,
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[m4_if(regexp([$1], [^.*[^/]//*[^/][^/]*/*$]), -1,
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m4_if(regexp([$1], [^//\([^/]\|$\)]), -1,
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m4_if(regexp([$1], [^/.*]), -1,
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[.],
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m4_patsubst([$1], [^\(/\).*], [\1])),
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m4_patsubst([$1], [^\(//\)\([^/].*\|$\)], [\1])),
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m4_patsubst([$1], [^\(.*[^/]\)//*[^/][^/]*/*$], [\1]))[]dnl
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patsubst([$1], [^\(/\).*], [\1])),
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patsubst([$1], [^\(//\)\([^/].*\|$\)], [\1])),
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patsubst([$1], [^\(.*[^/]\)//*[^/][^/]*/*$], [\1]))[]dnl
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]) # _AM_DIRNAME
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AC_DEFUN([LIBUNWIND___THREAD],
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[dnl Check whether the compiler supports the __thread keyword.
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if test "x$use__thread" != xno; then
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AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
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[cat > conftest.c <<\EOF
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__thread int a = 42;
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EOF
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
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libc_cv_gcc___thread=yes
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else
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libc_cv_gcc___thread=no
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fi
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rm -f conftest*])
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if test "$libc_cv_gcc___thread" = yes; then
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AC_DEFINE(HAVE___THREAD)
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fi
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else
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libc_cv_gcc___thread=no
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fi])
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