GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. # Local configure fragment for sysdeps/s390. dnl It is always possible to access static and hidden symbols in an dnl position independent way. AC_DEFINE(PI_STATIC_AND_HIDDEN) AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl cat > conftest.c <<\EOF #include void testtransaction () { if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED) { __builtin_tend (); } } EOF dnl dnl test, if the tbegin instruction is used by __builtin_tbegin if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ; then libc_cv_gcc_builtin_tbegin=yes else libc_cv_gcc_builtin_tbegin=no fi rm -f conftest* ]) if test "$libc_cv_gcc_builtin_tbegin" = no ; then critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390." fi AC_CACHE_CHECK(for S390 vector instruction support, libc_cv_asm_s390_vx, [dnl cat > conftest.c <<\EOF void testvecinsn () { __asm__ (".machine \"z13\" \n\t" ".machinemode \"zarch_nohighgprs\" \n\t" "vistrbs %%v16,%%v17 \n\t" "locghie %%r1,0" : :); } EOF dnl dnl test, if assembler supports S390 vector instructions if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ; then libc_cv_asm_s390_vx=yes else libc_cv_asm_s390_vx=no fi rm -f conftest* ]) if test "$libc_cv_asm_s390_vx" = yes ; then AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT) else AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.]) fi AC_CACHE_CHECK(for S390 vector support in gcc, libc_cv_gcc_s390_vx, [dnl cat > conftest.c <<\EOF void testvecclobber () { __asm__ ("" : : : "v16"); } EOF dnl dnl test, if gcc supports S390 vector registers as clobber in inline assembly if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ; then libc_cv_gcc_s390_vx=yes else libc_cv_gcc_s390_vx=no fi rm -f conftest* ]) if test "$libc_cv_gcc_s390_vx" = yes ; then AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT) fi AC_CACHE_CHECK(for S390 arch13 zarch instruction support, libc_cv_asm_s390_arch13, [dnl cat > conftest.c <<\EOF void testinsn (char *buf) { __asm__ (".machine \"arch13\" \n\t" ".machinemode \"zarch_nohighgprs\" \n\t" "lghi %%r0,16 \n\t" "mvcrl 0(%0),32(%0) \n\t" "vstrs %%v20,%%v20,%%v20,%%v20,0,2" : : "a" (buf) : "memory", "r0"); } EOF dnl test, if assembler supports S390 arch13 instructions if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c -o conftest.o &> /dev/null]) ; then libc_cv_asm_s390_arch13=yes else libc_cv_asm_s390_arch13=no fi rm -f conftest* ]) if test "$libc_cv_asm_s390_arch13" = yes ; then AC_DEFINE(HAVE_S390_ARCH13_ASM_SUPPORT) fi AC_CACHE_CHECK(for S390 z10 zarch instruction support as default, libc_cv_asm_s390_min_z10_zarch, [dnl cat > conftest.c <<\EOF void testinsn (void *a, void *b, int n) { __asm__ ("exrl %2,1f \n\t" "j 2f \n\t" "1: mvc 0(1,%0),0(%1) \n\t" "2:" : : "a" (a), "a" (b), "d" (n) : "memory", "cc"); } EOF dnl dnl test, if assembler supports S390 z10 zarch instructions as default if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c -o conftest.o &> /dev/null]) ; then libc_cv_asm_s390_min_z10_zarch=yes else libc_cv_asm_s390_min_z10_zarch=no fi rm -f conftest* ]) if test "$libc_cv_asm_s390_min_z10_zarch" = yes ; then AC_DEFINE(HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT) fi AC_CACHE_CHECK(for S390 z196 zarch instruction support as default, libc_cv_asm_s390_min_z196_zarch, [dnl cat > conftest.c <<\EOF float testinsn (double e) { float d; __asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) ); return d; } EOF dnl dnl test, if assembler supports S390 z196 zarch instructions as default if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c -o conftest.o &> /dev/null]) ; then libc_cv_asm_s390_min_z196_zarch=yes else libc_cv_asm_s390_min_z196_zarch=no fi rm -f conftest* ]) if test "$libc_cv_asm_s390_min_z196_zarch" = yes ; then AC_DEFINE(HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT) fi AC_CACHE_CHECK(for S390 z13 zarch instruction support as default, libc_cv_asm_s390_min_z13_zarch, [dnl cat > conftest.c <<\EOF int testinsn (void) { int i; __asm__ ("vl %%v16,0(%%r15)\n\t" "vlgvf %0,%%v16,0" : "=d" (i) : : "memory", "v16"); return i; } EOF dnl dnl test, if assembler supports S390 z13 zarch instructions as default if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c -o conftest.o &> /dev/null]) ; then libc_cv_asm_s390_min_z13_zarch=yes else libc_cv_asm_s390_min_z13_zarch=no fi rm -f conftest* ]) if test "$libc_cv_asm_s390_min_z13_zarch" = yes ; then AC_DEFINE(HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT) fi AC_CACHE_CHECK(for S390 arch13 zarch instruction support as default, libc_cv_asm_s390_min_arch13_zarch, [dnl cat > conftest.c <<\EOF void testinsn (char *buf) { __asm__ ("lghi %%r0,16 \n\t" "mvcrl 0(%0),32(%0) \n\t" "vstrs %%v20,%%v20,%%v20,%%v20,0,2" : : "a" (buf) : "memory", "r0"); } EOF dnl test, if assembler supports S390 arch13 zarch instructions as default if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c -o conftest.o &> /dev/null]) ; then libc_cv_asm_s390_min_arch13_zarch=yes else libc_cv_asm_s390_min_arch13_zarch=no fi rm -f conftest* ]) if test "$libc_cv_asm_s390_min_arch13_zarch" = yes ; then AC_DEFINE(HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT) fi dnl test if GCC is new enough. See gcc "Bug 98269 - gcc 6.5.0 dnl __builtin_add_overflow() with small uint32_t values incorrectly detects dnl overflow dnl (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269) AC_CACHE_CHECK([if $CC is sufficient to build libc on s390x], libc_cv_compiler_ok_on_s390x, [ AC_TRY_COMPILE([], [ #if !defined __GNUC__ || __GNUC__ < 7 || (__GNUC__ == 7 && __GNUC_MINOR__ < 1) #error insufficient compiler for building on s390x #endif ], [libc_cv_compiler_ok_on_s390x=yes], [libc_cv_compiler_ok_on_s390x=no])]) if test "$libc_cv_compiler_ok_on_s390x" != yes; then critic_missing="$critic_missing On s390x, GCC >= 7.1.0 is required." fi test -n "$critic_missing" && AC_MSG_ERROR([ *** $critic_missing])