diff options
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/m4_ax_pthread.m4 | 90 |
1 files changed, 60 insertions, 30 deletions
diff --git a/m4/m4_ax_pthread.m4 b/m4/m4_ax_pthread.m4 index a6bf596c..d383ad5c 100644 --- a/m4/m4_ax_pthread.m4 +++ b/m4/m4_ax_pthread.m4 @@ -82,7 +82,7 @@ # modified version of the Autoconf Macro, you may extend this special # exception to the GPL to apply to your modified version as well. -#serial 16 +#serial 21 AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) AC_DEFUN([AX_PTHREAD], [ @@ -103,8 +103,8 @@ if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then save_LIBS="$LIBS" LIBS="$PTHREAD_LIBS $LIBS" AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS]) - AC_TRY_LINK_FUNC(pthread_join, ax_pthread_ok=yes) - AC_MSG_RESULT($ax_pthread_ok) + AC_TRY_LINK_FUNC([pthread_join], [ax_pthread_ok=yes]) + AC_MSG_RESULT([$ax_pthread_ok]) if test x"$ax_pthread_ok" = xno; then PTHREAD_LIBS="" PTHREAD_CFLAGS="" @@ -145,8 +145,8 @@ ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt # --thread-safe: KAI C++ # pthread-config: use pthread-config program (for GNU Pth library) -case "${host_cpu}-${host_os}" in - *solaris*) +case ${host_os} in + solaris*) # On Solaris (at least, for some versions), libc contains stubbed # (non-functional) versions of the pthreads routines, so link-based @@ -159,11 +159,25 @@ case "${host_cpu}-${host_os}" in ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags" ;; - *-darwin*) + darwin*) ax_pthread_flags="-pthread $ax_pthread_flags" ;; esac +# Clang doesn't consider unrecognized options an error unless we specify +# -Werror. We throw in some extra Clang-specific options to ensure that +# this doesn't happen for GCC, which also accepts -Werror. + +AC_MSG_CHECKING([if compiler needs -Werror to reject unknown flags]) +save_CFLAGS="$CFLAGS" +ax_pthread_extra_flags="-Werror" +CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wunknown-warning-option -Wsizeof-array-argument" +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([int foo(void);],[foo()])], + [AC_MSG_RESULT([yes])], + [ax_pthread_extra_flags= + AC_MSG_RESULT([no])]) +CFLAGS="$save_CFLAGS" + if test x"$ax_pthread_ok" = xno; then for flag in $ax_pthread_flags; do @@ -178,7 +192,7 @@ for flag in $ax_pthread_flags; do ;; pthread-config) - AC_CHECK_PROG(ax_pthread_config, pthread-config, yes, no) + AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) if test x"$ax_pthread_config" = xno; then continue; fi PTHREAD_CFLAGS="`pthread-config --cflags`" PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" @@ -193,7 +207,7 @@ for flag in $ax_pthread_flags; do save_LIBS="$LIBS" save_CFLAGS="$CFLAGS" LIBS="$PTHREAD_LIBS $LIBS" - CFLAGS="$CFLAGS $PTHREAD_CFLAGS" + CFLAGS="$CFLAGS $PTHREAD_CFLAGS $ax_pthread_extra_flags" # Check for various functions. We must include pthread.h, # since some functions may be macros. (On the Sequent, we @@ -219,7 +233,7 @@ for flag in $ax_pthread_flags; do LIBS="$save_LIBS" CFLAGS="$save_CFLAGS" - AC_MSG_RESULT($ax_pthread_ok) + AC_MSG_RESULT([$ax_pthread_ok]) if test "x$ax_pthread_ok" = xyes; then break; fi @@ -245,54 +259,70 @@ if test "x$ax_pthread_ok" = xyes; then [attr_name=$attr; break], []) done - AC_MSG_RESULT($attr_name) + AC_MSG_RESULT([$attr_name]) if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then - AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name, + AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], [$attr_name], [Define to necessary symbol if this constant uses a non-standard name on your system.]) fi AC_MSG_CHECKING([if more special flags are required for pthreads]) flag=no - case "${host_cpu}-${host_os}" in - *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";; - *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";; + case ${host_os} in + aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";; + osf* | hpux*) flag="-D_REENTRANT";; + solaris*) + if test "$GCC" = "yes"; then + flag="-D_REENTRANT" + else + # TODO: What about Clang on Solaris? + flag="-mt -D_REENTRANT" + fi + ;; esac - AC_MSG_RESULT(${flag}) + AC_MSG_RESULT([$flag]) if test "x$flag" != xno; then PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS" fi AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT], - ax_cv_PTHREAD_PRIO_INHERIT, [ - AC_LINK_IFELSE([ - AC_LANG_PROGRAM([[#include <pthread.h>]], [[int i = PTHREAD_PRIO_INHERIT;]])], + [ax_cv_PTHREAD_PRIO_INHERIT], [ + AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], + [[int i = PTHREAD_PRIO_INHERIT;]])], [ax_cv_PTHREAD_PRIO_INHERIT=yes], [ax_cv_PTHREAD_PRIO_INHERIT=no]) ]) AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"], - AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], 1, [Have PTHREAD_PRIO_INHERIT.])) + [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])]) LIBS="$save_LIBS" CFLAGS="$save_CFLAGS" - # More AIX lossage: must compile with xlc_r or cc_r - if test x"$GCC" != xyes; then - AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC}) - else - PTHREAD_CC=$CC + # More AIX lossage: compile with *_r variant + if test "x$GCC" != xyes; then + case $host_os in + aix*) + AS_CASE(["x/$CC"], + [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6], + [#handle absolute path differently from PATH based program lookup + AS_CASE(["x$CC"], + [x/*], + [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])], + [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])]) + ;; + esac fi -else - PTHREAD_CC="$CC" fi -AC_SUBST(PTHREAD_LIBS) -AC_SUBST(PTHREAD_CFLAGS) -AC_SUBST(PTHREAD_CC) +test -n "$PTHREAD_CC" || PTHREAD_CC="$CC" + +AC_SUBST([PTHREAD_LIBS]) +AC_SUBST([PTHREAD_CFLAGS]) +AC_SUBST([PTHREAD_CC]) # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: if test x"$ax_pthread_ok" = xyes; then - ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1]) + ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1]) : else ax_pthread_ok=no |