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Enforce usage -zrelax=transtls when GNU C Compiler is used on Solaris

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When GNU C Compiler is used on Solaris (11), the Thread Local Storage
is completely broken.  The behaviour doesn't manifest when GNU ld is
used.  Thus, we need to enforce usage of GNU ld when GNU C Compiler is
the compiler of choice.

For more background for this change, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90912
This commit is contained in:
Ondřej Surý
2019-06-19 11:21:36 +02:00
committed by Witold Krecicki
parent 95a8e42e57
commit d584223653
2 changed files with 28 additions and 0 deletions
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11
configure.ac
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@@ -326,6 +326,17 @@ esac
AC_PROG_CC
AC_PROG_CC_C99
#
# Using Solaris linker with gcc on Solaris breaks Thread Local Storage
#
AS_CASE([$host],
[*-solaris*],[
AS_IF([test "$GCC" = "yes"],
[LDFLAGS="$LDFLAGS -zrelax=transtls"
AC_MSG_WARN([When using GNU C Compiler on Solaris, -zrelax=transtls linker flag is used to fix bug in Thread Local Storage])
])
])
#
# CCNOOPT defaults to -O0 on gcc and disables optimization when is last
#