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|
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 <htmintrin.h>
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 $CC is sufficient to build libc on s390x],
libc_cv_compiler_ok_on_s390x, [
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
#if !defined __GNUC__ || __GNUC__ < 7 || (__GNUC__ == 7 && __GNUC_MINOR__ < 1)
#error insufficient compiler for building on s390x
#endif
]])],
[libc_cv_compiler_ok_on_s390x=yes],
[libc_cv_compiler_ok_on_s390x=no])])
if test "$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])
|
