Mercurial > hg > CbC > CbC_gcc

comparison config/tls.m4 @ 145:1830386684a0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
parents f6334be47118
children
comparison
equal deleted inserted replaced
131:84e7813d76e9 145:1830386684a0
2 AC_DEFUN([GCC_CHECK_TLS], [ 2 AC_DEFUN([GCC_CHECK_TLS], [
3 AC_REQUIRE([AC_CANONICAL_HOST]) 3 AC_REQUIRE([AC_CANONICAL_HOST])
4 GCC_ENABLE(tls, yes, [], [Use thread-local storage]) 4 GCC_ENABLE(tls, yes, [], [Use thread-local storage])
5 AC_CACHE_CHECK([whether the target supports thread-local storage], 5 AC_CACHE_CHECK([whether the target supports thread-local storage],
6 gcc_cv_have_tls, [ 6 gcc_cv_have_tls, [
7 AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }], 7 AC_RUN_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int main() { return a = b; }])],
8 [dnl If the test case passed with dynamic linking, try again with 8 [dnl If the test case passed with dynamic linking, try again with
9 dnl static linking, but only if static linking is supported (not 9 dnl static linking, but only if static linking is supported (not
10 dnl on Solaris 10). This fails with some older Red Hat releases. 10 dnl on Solaris 10). This fails with some older Red Hat releases.
11 chktls_save_LDFLAGS="$LDFLAGS" 11 chktls_save_LDFLAGS="$LDFLAGS"
12 LDFLAGS="-static $LDFLAGS" 12 LDFLAGS="-static $LDFLAGS"
13 AC_LINK_IFELSE([int main() { return 0; }], 13 AC_LINK_IFELSE([AC_LANG_SOURCE([int main() { return 0; }])],
14 [AC_RUN_IFELSE([__thread int a; int b; int main() { return a = b; }], 14 [AC_RUN_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int main() { return a = b; }])],
15 [gcc_cv_have_tls=yes], [gcc_cv_have_tls=no],[])], 15 [gcc_cv_have_tls=yes], [gcc_cv_have_tls=no],[])],
16 [gcc_cv_have_tls=yes]) 16 [gcc_cv_have_tls=yes])
17 LDFLAGS="$chktls_save_LDFLAGS" 17 LDFLAGS="$chktls_save_LDFLAGS"
18 if test $gcc_cv_have_tls = yes; then 18 if test $gcc_cv_have_tls = yes; then
19 dnl So far, the binutils and the compiler support TLS. 19 dnl So far, the binutils and the compiler support TLS.
69 fi 69 fi
70 fi], 70 fi],
71 [gcc_cv_have_tls=no], 71 [gcc_cv_have_tls=no],
72 [dnl This is the cross-compiling case. Assume libc supports TLS if the 72 [dnl This is the cross-compiling case. Assume libc supports TLS if the
73 dnl binutils and the compiler do. 73 dnl binutils and the compiler do.
74 AC_LINK_IFELSE([__thread int a; int b; int main() { return a = b; }], 74 AC_LINK_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int main() { return a = b; }])],
75 [chktls_save_LDFLAGS="$LDFLAGS" 75 [chktls_save_LDFLAGS="$LDFLAGS"
76 dnl Shared library options may depend on the host; this check 76 dnl Shared library options may depend on the host; this check
77 dnl is only known to be needed for GNU/Linux. 77 dnl is only known to be needed for GNU/Linux.
78 case $host in 78 case $host in
79 *-*-linux*) 79 *-*-linux* | -*-uclinuxfdpic*)
80 LDFLAGS="-shared -Wl,--no-undefined $LDFLAGS" 80 LDFLAGS="-shared -Wl,--no-undefined $LDFLAGS"
81 ;; 81 ;;
82 esac 82 esac
83 chktls_save_CFLAGS="$CFLAGS" 83 chktls_save_CFLAGS="$CFLAGS"
84 CFLAGS="-fPIC $CFLAGS" 84 CFLAGS="-fPIC $CFLAGS"
85 dnl If -shared works, test if TLS works in a shared library. 85 dnl If -shared works, test if TLS works in a shared library.
86 AC_LINK_IFELSE([int f() { return 0; }], 86 AC_LINK_IFELSE([AC_LANG_SOURCE([int f() { return 0; }])],
87 [AC_LINK_IFELSE([__thread int a; int b; int f() { return a = b; }], 87 [AC_LINK_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int f() { return a = b; }])],
88 [gcc_cv_have_tls=yes], 88 [gcc_cv_have_tls=yes],
89 [gcc_cv_have_tls=no])], 89 [gcc_cv_have_tls=no])],
90 [gcc_cv_have_tls=yes]) 90 [gcc_cv_have_tls=yes])
91 CFLAGS="$chktls_save_CFLAGS" 91 CFLAGS="$chktls_save_CFLAGS"
92 LDFLAGS="$chktls_save_LDFLAGS"], [gcc_cv_have_tls=no]) 92 LDFLAGS="$chktls_save_LDFLAGS"], [gcc_cv_have_tls=no])
100 dnl Check whether the target assembler supports TLS. 100 dnl Check whether the target assembler supports TLS.
101 AC_DEFUN([GCC_CHECK_CC_TLS], [ 101 AC_DEFUN([GCC_CHECK_CC_TLS], [
102 GCC_ENABLE(tls, yes, [], [Use thread-local storage]) 102 GCC_ENABLE(tls, yes, [], [Use thread-local storage])
103 AC_CACHE_CHECK([whether the target assembler supports thread-local storage], 103 AC_CACHE_CHECK([whether the target assembler supports thread-local storage],
104 gcc_cv_have_cc_tls, [ 104 gcc_cv_have_cc_tls, [
105 AC_COMPILE_IFELSE([__thread int a; int b; int main() { return a = b; }], 105 AC_COMPILE_IFELSE([AC_LANG_SOURCE([__thread int a; int b; int main() { return a = b; }])],
106 [gcc_cv_have_cc_tls=yes], [gcc_cv_have_cc_tls=no])] 106 [gcc_cv_have_cc_tls=yes], [gcc_cv_have_cc_tls=no])]
107 )]) 107 )])
108 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then 108 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
109 AC_DEFINE(HAVE_CC_TLS, 1, 109 AC_DEFINE(HAVE_CC_TLS, 1,
110 [Define to 1 if the target assembler supports thread-local storage.]) 110 [Define to 1 if the target assembler supports thread-local storage.])