sysdeps/unix/sysv/linux/powerpc/configure.in

   1 sinclude(./aclocal.m4)dnl Autoconf lossage
   2 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
   3 # Local configure fragment for sysdeps/unix/sysv/linux/powerpc/.
   4
   5 AC_CACHE_CHECK(whether $CC $CFLAGS -mlong-double-128 uses IBM extended format,
   6                libc_cv_mlong_double_128ibm, [dnl
   7 save_CFLAGS="$CFLAGS"
   8 CFLAGS="$CFLAGS -mlong-double-128"
   9 AC_TRY_COMPILE([#include <float.h>], [
  10 #if LDBL_MANT_DIG != 106
  11 # error "compiler doesn't implement IBM extended format of long double"
  12 #endif
  13 long double foobar (long double x) { return x; }],
  14                libc_cv_mlong_double_128ibm=yes,
  15                libc_cv_mlong_double_128ibm=no)
  16 CFLAGS="$save_CFLAGS"])
  17
  18 if test "$libc_cv_mlong_double_128ibm" = no; then
  19   AC_CACHE_CHECK(whether $CC $CFLAGS supports -mabi=ibmlongdouble,
  20                  libc_cv_mabi_ibmlongdouble, [dnl
  21   save_CFLAGS="$CFLAGS"
  22   CFLAGS="$CFLAGS -mlong-double-128 -mabi=ibmlongdouble"
  23   AC_TRY_COMPILE([#include <float.h>], [
  24 #if LDBL_MANT_DIG != 106
  25 # error "compiler doesn't implement IBM extended format of long double"
  26 #endif
  27 long double foobar (long double x) { return x; }],
  28                  libc_cv_mabi_ibmlongdouble=yes,
  29                  libc_cv_mabi_ibmlongdouble=no)
  30   CFLAGS="$save_CFLAGS"])
  31
  32   if test "$libc_cv_mabi_ibmlongdouble" = yes; then
  33     CFLAGS="$CFLAGS -mabi=ibmlongdouble"
  34   else
  35     AC_MSG_ERROR([this configuration requires -mlong-double-128 IBM extended format support])
  36   fi
  37 fi