* builds/unix/ax_pthread.m4: Update from 'autoconf-archive'.
A bunch of fixes were added recently to its git repository.
This commit is contained in:
Werner Lemberg
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2021-02-19 Werner Lemberg <wl@gnu.org>
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* builds/unix/ax_pthread.m4: Update from 'autoconf-archive'.
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A bunch of fixes were added recently to its git repository.
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2021-02-17 Werner Lemberg <wl@gnu.org>
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[unix] Updates for autoconf 2.71.
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@ -14,20 +14,24 @@
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# flags that are needed. (The user can also force certain compiler
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# flags/libs to be tested by setting these environment variables.)
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#
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# Also sets PTHREAD_CC to any special C compiler that is needed for
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# multi-threaded programs (defaults to the value of CC otherwise). (This
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# is necessary on AIX to use the special cc_r compiler alias.)
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# Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is
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# needed for multi-threaded programs (defaults to the value of CC
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# respectively CXX otherwise). (This is necessary on e.g. AIX to use the
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# special cc_r/CC_r compiler alias.)
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#
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# NOTE: You are assumed to not only compile your program with these flags,
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# but also to link with them as well. For example, you might link with
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# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
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# $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
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#
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# If you are only building threaded programs, you may wish to use these
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# variables in your default LIBS, CFLAGS, and CC:
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#
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# LIBS="$PTHREAD_LIBS $LIBS"
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# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
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# CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"
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# CC="$PTHREAD_CC"
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# CXX="$PTHREAD_CXX"
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#
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# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
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# has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
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@ -83,11 +87,11 @@
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# modified version of the Autoconf Macro, you may extend this special
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# exception to the GPL to apply to your modified version as well.
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#serial 27
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#serial 30
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AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
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AC_DEFUN([AX_PTHREAD], [
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_REQUIRE([AC_CANONICAL_TARGET])
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([AC_PROG_SED])
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AC_LANG_PUSH([C])
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@ -105,6 +109,7 @@ if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
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ax_pthread_save_CFLAGS="$CFLAGS"
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ax_pthread_save_LIBS="$LIBS"
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AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
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AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])
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CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
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LIBS="$PTHREAD_LIBS $LIBS"
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AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
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@ -153,7 +158,7 @@ ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --
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# --thread-safe: KAI C++
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# pthread-config: use pthread-config program (for GNU Pth library)
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case $host_os in
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case $target_os in
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freebsd*)
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@ -243,7 +248,7 @@ AS_IF([test "x$ax_pthread_clang" = "xyes"],
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# definitions is, on some systems, a strong hint that pthreads support is
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# correctly enabled
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case $host_os in
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case $target_os in
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darwin* | hpux* | linux* | osf* | solaris*)
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ax_pthread_check_macro="_REENTRANT"
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;;
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@ -445,7 +450,7 @@ if test "x$ax_pthread_ok" = "xyes"; then
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AC_CACHE_CHECK([whether more special flags are required for pthreads],
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[ax_cv_PTHREAD_SPECIAL_FLAGS],
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[ax_cv_PTHREAD_SPECIAL_FLAGS=no
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case $host_os in
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case $target_os in
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solaris*)
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ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
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;;
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@ -475,25 +480,35 @@ if test "x$ax_pthread_ok" = "xyes"; then
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# More AIX lossage: compile with *_r variant
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if test "x$GCC" != "xyes"; then
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case $host_os in
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case $target_os in
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aix*)
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AS_CASE(["x/$CC"],
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[x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
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[#handle absolute path differently from PATH based program lookup
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AS_CASE(["x$CC"],
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[x/*],
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[AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
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[AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
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[
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AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])
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AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])])
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],
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[
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AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])
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AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])])
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]
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)
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])
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;;
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esac
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fi
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fi
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test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
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test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
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AC_SUBST([PTHREAD_LIBS])
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AC_SUBST([PTHREAD_CFLAGS])
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AC_SUBST([PTHREAD_CC])
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AC_SUBST([PTHREAD_CXX])
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# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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if test "x$ax_pthread_ok" = "xyes"; then
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