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| author | Pau Espin Pedrol <pespin@sysmocom.de> | 2019-08-05 13:46:33 +0200 |
|---|---|---|
| committer | pespin <pespin@sysmocom.de> | 2019-08-06 08:10:48 +0000 |
| commit | e188b8cd98f599468fbb200c7d590de955daf761 (patch) | |
| tree | 1ae76ce3e018a19282bacb8b68097ee7cc98a2a4 /configure.ac | |
| parent | f65278f807da1a5af6b9b76d943c64cb18ebc7c2 (diff) | |
configure: Autodetect TLS bug on ARM with old gcc and apply workaround
Check if compiler being used contains the bug. GCC 7.3.0 is the oldest
version containing the fix, and version 6.3.0 is known to contain the
bug. Bug is only known to appear so far only on ARM32. If the bug is
present, gcc will generate a wrong binary which wil lend up segfaulting
when accessing TLS (__thread) variables under certain conditions.
Related: OS#4062
Related: SYS#4628
Change-Id: I8acc2cf41b73da0c3290f1cefd79f2bc68b0e77d
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index d717a0bb..3764e29e 100644 --- a/configure.ac +++ b/configure.ac @@ -122,6 +122,10 @@ AC_DEFUN([CHECK_TM_INCLUDES_TM_GMTOFF], [ CHECK_TM_INCLUDES_TM_GMTOFF +dnl Check if We need to apply workaround for TLS bug on ARM platform for GCC < 7.3.0: +CHECK_TLS_GCC_ARM_BUG +CFLAGS="$CFLAGS $TLS_GCC_ARM_BUG_CFLAGS" + dnl Generate the output AC_CONFIG_HEADER(config.h) |