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Messages bellow be supressed by using AC_LANG_SOURCE macro around
code test blocks.
m4/tls.m4:13: AX_CHECK_TLS is expanded from...
configure.ac:335: the top level
configure.ac:335: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
../../lib/autoconf/lang.m4:193: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2660: _AC_LINK_IFELSE is expanded from...
../../lib/autoconf/general.m4:2677: AC_LINK_IFELSE is expanded from...
../../lib/m4sugar/m4sh.m4:605: AS_IF is expanded from...
../../lib/autoconf/general.m4:2728: _AC_RUN_IFELSE is expanded from...
../../lib/m4sugar/m4sh.m4:605: AS_IF is expanded from...
../../lib/autoconf/general.m4:2747: AC_RUN_IFELSE is expanded from...
../../lib/m4sugar/m4sh.m4:605: AS_IF is expanded from...
../../lib/autoconf/general.m4:2030: AC_CACHE_VAL is expanded from...
../../lib/autoconf/general.m4:2051: AC_CACHE_CHECK is expanded from...
m4/tls.m4:13: AX_CHECK_TLS is expanded from...
configure.ac:335: the top level
Reference to documentation;
http://www.flameeyes.eu/autotools-mythbuster/forwardporting/autoconf.html#id1168723648533
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
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* use more robust tls.m4 from gcc project
The old version (from util-linux-ng) used AC_TRY_COMPILE. That's
wrong. We need to use AC_RUN_IFELSE to check that the result is
link-able and executable.
The new version also test it TLS really works in multi-thread
applications.
* we need to detect TLS usability for cross-compiling
* this new version supports __thread keyword only, it seems that we
needn't to care about anything other
Signed-off-by: Karel Zak <kzak@redhat.com>
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* add AX_TLS autoconf macro
* add --disabletls option
* cleanup gen_uuid.c code to remove gcc warnings when compiled
without TLS macro.
Signed-off-by: Karel Zak <kzak@redhat.com>
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