1GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. 2# Local configure fragment for sysdeps/s390. 3 4dnl It is always possible to access static and hidden symbols in an 5dnl position independent way. 6AC_DEFINE(PI_STATIC_AND_HIDDEN) 7 8AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl 9cat > conftest.c <<\EOF 10#include <htmintrin.h> 11void testtransaction () 12{ 13 if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED) 14 { 15 __builtin_tend (); 16 } 17} 18EOF 19dnl 20dnl test, if the tbegin instruction is used by __builtin_tbegin 21if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ; 22then 23 libc_cv_gcc_builtin_tbegin=yes 24else 25 libc_cv_gcc_builtin_tbegin=no 26fi 27rm -f conftest* ]) 28 29if test "$libc_cv_gcc_builtin_tbegin" = no ; then 30 critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390." 31fi 32 33 34AC_CACHE_CHECK(for S390 vector instruction support, libc_cv_asm_s390_vx, [dnl 35cat > conftest.c <<\EOF 36void testvecinsn () 37{ 38 __asm__ (".machine \"z13\" \n\t" 39 ".machinemode \"zarch_nohighgprs\" \n\t" 40 "vistrbs %%v16,%%v17 \n\t" 41 "locghie %%r1,0" : :); 42} 43EOF 44dnl 45dnl test, if assembler supports S390 vector instructions 46if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ; 47then 48 libc_cv_asm_s390_vx=yes 49else 50 libc_cv_asm_s390_vx=no 51fi 52rm -f conftest* ]) 53 54if test "$libc_cv_asm_s390_vx" = yes ; 55then 56 AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT) 57else 58 AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.]) 59fi 60 61AC_CACHE_CHECK(for S390 vector support in gcc, libc_cv_gcc_s390_vx, [dnl 62cat > conftest.c <<\EOF 63void testvecclobber () 64{ 65 __asm__ ("" : : : "v16"); 66} 67EOF 68dnl 69dnl test, if gcc supports S390 vector registers as clobber in inline assembly 70if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ; 71then 72 libc_cv_gcc_s390_vx=yes 73else 74 libc_cv_gcc_s390_vx=no 75fi 76rm -f conftest* ]) 77 78if test "$libc_cv_gcc_s390_vx" = yes ; 79then 80 AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT) 81fi 82 83AC_CACHE_CHECK(for S390 arch13 zarch instruction support, 84 libc_cv_asm_s390_arch13, [dnl 85cat > conftest.c <<\EOF 86void testinsn (char *buf) 87{ 88 __asm__ (".machine \"arch13\" \n\t" 89 ".machinemode \"zarch_nohighgprs\" \n\t" 90 "lghi %%r0,16 \n\t" 91 "mvcrl 0(%0),32(%0) \n\t" 92 "vstrs %%v20,%%v20,%%v20,%%v20,0,2" 93 : : "a" (buf) : "memory", "r0"); 94} 95EOF 96dnl test, if assembler supports S390 arch13 instructions 97if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 98 -o conftest.o &> /dev/null]) ; 99then 100 libc_cv_asm_s390_arch13=yes 101else 102 libc_cv_asm_s390_arch13=no 103fi 104rm -f conftest* ]) 105if test "$libc_cv_asm_s390_arch13" = yes ; 106then 107 AC_DEFINE(HAVE_S390_ARCH13_ASM_SUPPORT) 108fi 109 110 111AC_CACHE_CHECK(for S390 z10 zarch instruction support as default, 112 libc_cv_asm_s390_min_z10_zarch, [dnl 113cat > conftest.c <<\EOF 114void testinsn (void *a, void *b, int n) 115{ 116 __asm__ ("exrl %2,1f \n\t" 117 "j 2f \n\t" 118 "1: mvc 0(1,%0),0(%1) \n\t" 119 "2:" 120 : : "a" (a), "a" (b), "d" (n) 121 : "memory", "cc"); 122} 123EOF 124dnl 125dnl test, if assembler supports S390 z10 zarch instructions as default 126if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 127 -o conftest.o &> /dev/null]) ; 128then 129 libc_cv_asm_s390_min_z10_zarch=yes 130else 131 libc_cv_asm_s390_min_z10_zarch=no 132fi 133rm -f conftest* ]) 134 135if test "$libc_cv_asm_s390_min_z10_zarch" = yes ; 136then 137 AC_DEFINE(HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT) 138fi 139 140AC_CACHE_CHECK(for S390 z196 zarch instruction support as default, 141 libc_cv_asm_s390_min_z196_zarch, [dnl 142cat > conftest.c <<\EOF 143float testinsn (double e) 144{ 145 float d; 146 __asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) ); 147 return d; 148} 149EOF 150dnl 151dnl test, if assembler supports S390 z196 zarch instructions as default 152if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 153 -o conftest.o &> /dev/null]) ; 154then 155 libc_cv_asm_s390_min_z196_zarch=yes 156else 157 libc_cv_asm_s390_min_z196_zarch=no 158fi 159rm -f conftest* ]) 160 161if test "$libc_cv_asm_s390_min_z196_zarch" = yes ; 162then 163 AC_DEFINE(HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT) 164fi 165 166AC_CACHE_CHECK(for S390 z13 zarch instruction support as default, 167 libc_cv_asm_s390_min_z13_zarch, [dnl 168cat > conftest.c <<\EOF 169int testinsn (void) 170{ 171 int i; 172 __asm__ ("vl %%v16,0(%%r15)\n\t" 173 "vlgvf %0,%%v16,0" 174 : "=d" (i) : : "memory", "v16"); 175 return i; 176} 177EOF 178dnl 179dnl test, if assembler supports S390 z13 zarch instructions as default 180if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 181 -o conftest.o &> /dev/null]) ; 182then 183 libc_cv_asm_s390_min_z13_zarch=yes 184else 185 libc_cv_asm_s390_min_z13_zarch=no 186fi 187rm -f conftest* ]) 188 189if test "$libc_cv_asm_s390_min_z13_zarch" = yes ; 190then 191 AC_DEFINE(HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT) 192fi 193 194AC_CACHE_CHECK(for S390 arch13 zarch instruction support as default, 195 libc_cv_asm_s390_min_arch13_zarch, [dnl 196cat > conftest.c <<\EOF 197void testinsn (char *buf) 198{ 199 __asm__ ("lghi %%r0,16 \n\t" 200 "mvcrl 0(%0),32(%0) \n\t" 201 "vstrs %%v20,%%v20,%%v20,%%v20,0,2" 202 : : "a" (buf) : "memory", "r0"); 203} 204EOF 205dnl test, if assembler supports S390 arch13 zarch instructions as default 206if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 207 -o conftest.o &> /dev/null]) ; 208then 209 libc_cv_asm_s390_min_arch13_zarch=yes 210else 211 libc_cv_asm_s390_min_arch13_zarch=no 212fi 213rm -f conftest* ]) 214if test "$libc_cv_asm_s390_min_arch13_zarch" = yes ; 215then 216 AC_DEFINE(HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT) 217fi 218 219dnl test if GCC is new enough. See gcc "Bug 98269 - gcc 6.5.0 220dnl __builtin_add_overflow() with small uint32_t values incorrectly detects 221dnl overflow 222dnl (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269) 223AC_CACHE_CHECK([if $CC is sufficient to build libc on s390x], 224libc_cv_compiler_ok_on_s390x, [ 225AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[ 226#if !defined __GNUC__ || __GNUC__ < 7 || (__GNUC__ == 7 && __GNUC_MINOR__ < 1) 227#error insufficient compiler for building on s390x 228#endif 229]])], 230 [libc_cv_compiler_ok_on_s390x=yes], 231 [libc_cv_compiler_ok_on_s390x=no])]) 232if test "$libc_cv_compiler_ok_on_s390x" != yes; then 233 critic_missing="$critic_missing On s390x, GCC >= 7.1.0 is required." 234fi 235 236test -n "$critic_missing" && AC_MSG_ERROR([ 237*** $critic_missing]) 238