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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

(cherry picked from commit d584223653)
This commit is contained in:
Ondřej Surý 2019-06-19 11:21:36 +02:00
parent 34bacac31e
commit e87a180187
2 changed files with 28 additions and 0 deletions
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17
configure vendored
View file

@ -13126,6 +13126,23 @@ fi
#
# Using Solaris linker with gcc on Solaris breaks Thread Local Storage
#
case $host in #(
*-solaris*) :
if test "$GCC" = "yes"; then :
LDFLAGS="$LDFLAGS -zrelax=transtls"
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: When using GNU C Compiler on Solaris, -zrelax=transtls linker flag is used to fix bug in Thread Local Storage" >&5
$as_echo "$as_me: WARNING: When using GNU C Compiler on Solaris, -zrelax=transtls linker flag is used to fix bug in Thread Local Storage" >&2;}
fi
;; #(
*) :
;;
esac
#
# CCNOOPT defaults to -O0 on gcc and disables optimization when is last
#

11
configure.ac
View file

@ -355,6 +355,17 @@ 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
#