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368b7c614b
Some of the s390-specific configure checks are using compile and link configure tests. Now use only compile tests as the link tests fails when e.g. bootstrapping a cross-toolchain due to missing crt-files/libc.so. This is achieved by using AC_COMPILE_IFELSE in configure.ac file. This is observable e.g. when using buildroot which builds glibc only once or the build-many-glibcs.py script. Note that the latter one is building glibc twice in the compilers-step (configure-checks fails) and in the glibcs-step (configure-checks succeed). Note, that the s390 specific configure tests for static PIE have to link an executable to test binutils support. Thus we can't fix those tests.
184 lines
5.0 KiB
Plaintext
184 lines
5.0 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/s390.
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AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl
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cat > conftest.c <<\EOF
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#include <htmintrin.h>
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void testtransaction ()
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{
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if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)
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{
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__builtin_tend ();
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}
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}
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EOF
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dnl
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dnl test, if the tbegin instruction is used by __builtin_tbegin
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if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ;
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then
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libc_cv_gcc_builtin_tbegin=yes
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else
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libc_cv_gcc_builtin_tbegin=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_gcc_builtin_tbegin" = no ; then
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critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
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fi
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AC_CACHE_CHECK([for S390 vector instruction support], libc_cv_asm_s390_vx, [
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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void testvecinsn ()
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{
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__asm__ (".machine \"z13\" \n\t"
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".machinemode \"zarch_nohighgprs\" \n\t"
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"vistrbs %%v16,%%v17 \n\t"
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"locghie %%r1,0" : :);
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}
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]])],
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[libc_cv_asm_s390_vx=yes],
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[libc_cv_asm_s390_vx=no])])
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if test "$libc_cv_asm_s390_vx" = yes ;
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then
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AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT)
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else
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AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.])
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fi
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dnl test, if gcc supports S390 vector registers as clobber in inline assembly
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AC_CACHE_CHECK([for S390 vector support in gcc], libc_cv_gcc_s390_vx, [
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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void testvecclobber ()
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{
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__asm__ ("" : : : "v16");
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}
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]])],
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[libc_cv_gcc_s390_vx=yes],
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[libc_cv_gcc_s390_vx=no])])
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if test "$libc_cv_gcc_s390_vx" = yes ;
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then
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AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT)
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fi
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AC_CACHE_CHECK([for S390 arch13 zarch instruction support],
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libc_cv_asm_s390_arch13, [
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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void testinsn (char *buf)
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{
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__asm__ (".machine \"arch13\" \n\t"
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".machinemode \"zarch_nohighgprs\" \n\t"
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"lghi %%r0,16 \n\t"
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"mvcrl 0(%0),32(%0) \n\t"
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"vstrs %%v20,%%v20,%%v20,%%v20,0,2"
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: : "a" (buf) : "memory", "r0");
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}
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]])],
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[libc_cv_asm_s390_arch13=yes],
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[libc_cv_asm_s390_arch13=no])])
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if test "$libc_cv_asm_s390_arch13" = yes ;
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then
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AC_DEFINE(HAVE_S390_ARCH13_ASM_SUPPORT)
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fi
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AC_CACHE_CHECK([for S390 z10 zarch instruction support as default],
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libc_cv_asm_s390_min_z10_zarch, [
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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void testinsn (void *a, void *b, int n)
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{
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__asm__ ("exrl %2,1f \n\t"
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"j 2f \n\t"
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"1: mvc 0(1,%0),0(%1) \n\t"
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"2:"
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: : "a" (a), "a" (b), "d" (n)
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: "memory", "cc");
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}
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]])],
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[libc_cv_asm_s390_min_z10_zarch=yes],
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[libc_cv_asm_s390_min_z10_zarch=no])])
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if test "$libc_cv_asm_s390_min_z10_zarch" = yes ;
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then
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AC_DEFINE(HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT)
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fi
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AC_CACHE_CHECK([for S390 z196 zarch instruction support as default],
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libc_cv_asm_s390_min_z196_zarch, [
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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float testinsn (double e)
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{
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float d;
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__asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) );
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return d;
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}
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]])],
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[libc_cv_asm_s390_min_z196_zarch=yes],
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[libc_cv_asm_s390_min_z196_zarch=no])])
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if test "$libc_cv_asm_s390_min_z196_zarch" = yes ;
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then
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AC_DEFINE(HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT)
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fi
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AC_CACHE_CHECK([for S390 z13 zarch instruction support as default],
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libc_cv_asm_s390_min_z13_zarch, [
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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int testinsn (void)
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{
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int i;
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__asm__ ("vl %%v16,0(%%r15)\n\t"
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"vlgvf %0,%%v16,0"
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: "=d" (i) : : "memory", "v16");
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return i;
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}
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]])],
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[libc_cv_asm_s390_min_z13_zarch=yes],
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[libc_cv_asm_s390_min_z13_zarch=no])])
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if test "$libc_cv_asm_s390_min_z13_zarch" = yes ;
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then
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AC_DEFINE(HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT)
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fi
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AC_CACHE_CHECK([for S390 arch13 zarch instruction support as default],
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libc_cv_asm_s390_min_arch13_zarch, [
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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void testinsn (char *buf)
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{
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__asm__ ("lghi %%r0,16 \n\t"
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"mvcrl 0(%0),32(%0) \n\t"
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"vstrs %%v20,%%v20,%%v20,%%v20,0,2"
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: : "a" (buf) : "memory", "r0");
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}
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]])],
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[libc_cv_asm_s390_min_arch13_zarch=yes],
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[libc_cv_asm_s390_min_arch13_zarch=no])])
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if test "$libc_cv_asm_s390_min_arch13_zarch" = yes ;
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then
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AC_DEFINE(HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT)
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fi
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dnl test if GCC is new enough. See gcc "Bug 98269 - gcc 6.5.0
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dnl __builtin_add_overflow() with small uint32_t values incorrectly detects
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dnl overflow
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dnl (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269)
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AC_CACHE_CHECK([if $CC is sufficient to build libc on s390x],
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libc_cv_compiler_ok_on_s390x, [
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AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
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#if !defined __GNUC__ || __GNUC__ < 7 || (__GNUC__ == 7 && __GNUC_MINOR__ < 1)
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#error insufficient compiler for building on s390x
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#endif
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]])],
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[libc_cv_compiler_ok_on_s390x=yes],
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[libc_cv_compiler_ok_on_s390x=no])])
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if test "$libc_cv_compiler_ok_on_s390x" != yes; then
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critic_missing="$critic_missing On s390x, GCC >= 7.1.0 is required."
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fi
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test -n "$critic_missing" && AC_MSG_ERROR([
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*** $critic_missing])
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