A while back I checked in a Fortran configure patch that allowed me to build
Fortran for the mips-mti-elf target. I used the same mechanism (checking
with_newlib) that libstdc++ and libjava use. This change broke the aarch64
Fortran build because that platform's newlib does not have strtold. I would
like to change configure to not define HAVE_STRTOLD. I could just remove that
define but instead I would again like to use the same code that the libstdc++
uses, by checking long_double_math_on_this_cpu. This variable is actually
never set, and because of this HAVE_STRTOLD is never set but that allows us to
build Fortran on mips and aarch64.
Mips would not use strtold even if HAVE_STRTOLD was defined because mips does
not define REAL*10 and the REAL*16 code checks GFC_REAL_16_IS_FLOAT128
(set for mips) before checking for HAVE_STRTOLD.
Marcus Shawcroft said it works for him on aarch64 and I tested it on mips,
OK for checkin?
Steve Ellcey
sell...@mips.com
2013-11-15 Steve Ellcey <sell...@mips.com>
* configure.ac: Do not define HAVE_STRTOLD.
* configure: Regenerate.
diff --git a/libgfortran/configure.ac b/libgfortran/configure.ac
index 6417373..6acc0f2 100644
--- a/libgfortran/configure.ac
+++ b/libgfortran/configure.ac
@@ -267,12 +267,18 @@ if test "x${with_newlib}" = "xyes"; then
# link executables.
AC_DEFINE(HAVE_MKSTEMP, 1, [Define if you have mkstemp.])
AC_DEFINE(HAVE_STRTOF, 1, [Define if you have strtof.])
- AC_DEFINE(HAVE_STRTOLD, 1, [Define if you have strtold.])
AC_DEFINE(HAVE_SNPRINTF, 1, [Define if you have snprintf.])
AC_DEFINE(HAVE_STRCASESTR, 1, [Define if you have strcasestr.])
AC_DEFINE(HAVE_VSNPRINTF, 1, [Define if you have vsnprintf.])
AC_DEFINE(HAVE_LOCALTIME_R, 1, [Define if you have localtime_r.])
AC_DEFINE(HAVE_GMTIME_R, 1, [Define if you have gmtime_r.])
+
+ # At some point, we should differentiate between architectures
+ # like x86, which have long double versions, and alpha/powerpc/etc.,
+ # which don't. For the time being, punt.
+ if test x"long_double_math_on_this_cpu" = x"yes"; then
+ AC_DEFINE(HAVE_STRTOLD, 1, [Define if you have strtold.])
+ fi
else
AC_CHECK_FUNCS_ONCE(getrusage times mkstemp strtof strtold snprintf \
ftruncate chsize chdir getlogin gethostname kill link symlink sleep ttyname
\
