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(LIBUNWIND__THREAD): New test.

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(Logical change 1.22)
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mostang.com!davidm 2002-11-09 07:59:02 +00:00
parent 193ba2859f
commit 56c93299f0
1 changed files with 26 additions and 7 deletions
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33
aclocal.m4 vendored
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@ -946,7 +946,7 @@ AC_DEFUN([AM_CONFIG_HEADER],
m4_ifndef([_AM_Config_Header_Index], m4_define([_AM_Config_Header_Index], [0]))
dnl prepare to store our destination file list for use in config.status
AC_FOREACH([_AM_File], [$1],
[m4_pushdef([_AM_Dest], m4_patsubst(_AM_File, [:.*]))
[m4_pushdef([_AM_Dest], patsubst(_AM_File, [:.*]))
m4_define([_AM_Config_Header_Index], m4_incr(_AM_Config_Header_Index))
dnl and add it to the list of files AC keeps track of, along
dnl with our hook
@ -987,12 +987,31 @@ done])
# -----------------
# Like AS_DIRNAME, only do it during macro expansion
AC_DEFUN([_AM_DIRNAME],
[m4_if(m4_regexp([$1], [^.*[^/]//*[^/][^/]*/*$]), -1,
m4_if(m4_regexp([$1], [^//\([^/]\|$\)]), -1,
m4_if(m4_regexp([$1], [^/.*]), -1,
[m4_if(regexp([$1], [^.*[^/]//*[^/][^/]*/*$]), -1,
m4_if(regexp([$1], [^//\([^/]\|$\)]), -1,
m4_if(regexp([$1], [^/.*]), -1,
[.],
m4_patsubst([$1], [^\(/\).*], [\1])),
m4_patsubst([$1], [^\(//\)\([^/].*\|$\)], [\1])),
m4_patsubst([$1], [^\(.*[^/]\)//*[^/][^/]*/*$], [\1]))[]dnl
patsubst([$1], [^\(/\).*], [\1])),
patsubst([$1], [^\(//\)\([^/].*\|$\)], [\1])),
patsubst([$1], [^\(.*[^/]\)//*[^/][^/]*/*$], [\1]))[]dnl
]) # _AM_DIRNAME
AC_DEFUN([LIBUNWIND___THREAD],
[dnl Check whether the compiler supports the __thread keyword.
if test "x$use__thread" != xno; then
AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread,
[cat > conftest.c <<\EOF
__thread int a = 42;
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
libc_cv_gcc___thread=yes
else
libc_cv_gcc___thread=no
fi
rm -f conftest*])
if test "$libc_cv_gcc___thread" = yes; then
AC_DEFINE(HAVE___THREAD)
fi
else
libc_cv_gcc___thread=no
fi])