diff options
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 new file mode 100644 index 0000000000..a5b389d5da --- /dev/null +++ b/acinclude.m4 @@ -0,0 +1,119 @@ +# A few convenience macros for Mesa, mostly to keep all the platform +# specifics out of configure.ac. + +# MESA_PIC_FLAGS() +# +# Find out whether to build PIC code using the option --enable-pic and +# the configure enable_static/enable_shared settings. If PIC is needed, +# figure out the necessary flags for the platform and compiler. +# +# The platform checks have been shamelessly taken from libtool and +# stripped down to just what's needed for Mesa. See _LT_COMPILER_PIC in +# /usr/share/aclocal/libtool.m4 or +# http://git.savannah.gnu.org/gitweb/?p=libtool.git;a=blob;f=libltdl/m4/libtool.m4;hb=HEAD +# +AC_DEFUN([MESA_PIC_FLAGS], +[AC_REQUIRE([AC_PROG_CC])dnl +AC_ARG_VAR([PIC_FLAGS], [compiler flags for PIC code]) +AC_ARG_ENABLE([pic], + [AS_HELP_STRING([--disable-pic], + [compile PIC objects @<:@default=enabled for shared builds + on supported platforms@:>@])], + [enable_pic="$enableval" + test "x$enable_pic" = x && enable_pic=auto], + [enable_pic=auto]) +# disable PIC by default for static builds +if test "$enable_pic" = auto && test "$enable_static" = yes; then + enable_pic=no +fi +# if PIC hasn't been explicitly disabled, try to figure out the flags +if test "$enable_pic" != no; then + AC_MSG_CHECKING([for $CC option to produce PIC]) + # allow the user's flags to override + if test "x$PIC_FLAGS" = x; then + # see if we're using GCC + if test "x$GCC" = xyes; then + case "$host_os" in + aix*|beos*|cygwin*|irix5*|irix6*|osf3*|osf4*|osf5*) + # PIC is the default for these OSes. + ;; + mingw*|os2*|pw32*) + # This hack is so that the source file can tell whether + # it is being built for inclusion in a dll (and should + # export symbols for example). + PIC_FLAGS="-DDLL_EXPORT" + ;; + darwin*|rhapsody*) + # PIC is the default on this platform + # Common symbols not allowed in MH_DYLIB files + PIC_FLAGS="-fno-common" + ;; + hpux*) + # PIC is the default for IA64 HP-UX and 64-bit HP-UX, + # but not for PA HP-UX. + case $host_cpu in + hppa*64*|ia64*) + ;; + *) + PIC_FLAGS="-fPIC" + ;; + esac + ;; + *) + # Everyone else on GCC uses -fPIC + PIC_FLAGS="-fPIC" + ;; + esac + else # !GCC + case "$host_os" in + hpux9*|hpux10*|hpux11*) + # PIC is the default for IA64 HP-UX and 64-bit HP-UX, + # but not for PA HP-UX. + case "$host_cpu" in + hppa*64*|ia64*) + # +Z the default + ;; + *) + PIC_FLAGS="+Z" + ;; + esac + ;; + linux*|k*bsd*-gnu) + case `basename "$CC"` in + icc*|ecc*|ifort*) + PIC_FLAGS="-KPIC" + ;; + pgcc*|pgf77*|pgf90*|pgf95*) + # Portland Group compilers (*not* the Pentium gcc + # compiler, which looks to be a dead project) + PIC_FLAGS="-fpic" + ;; + ccc*) + # All Alpha code is PIC. + ;; + xl*) + # IBM XL C 8.0/Fortran 10.1 on PPC + PIC_FLAGS="-qpic" + ;; + *) + case `$CC -V 2>&1 | sed 5q` in + *Sun\ C*|*Sun\ F*) + # Sun C 5.9 or Sun Fortran + PIC_FLAGS="-KPIC" + ;; + esac + esac + ;; + solaris*) + PIC_FLAGS="-KPIC" + ;; + sunos4*) + PIC_FLAGS="-PIC" + ;; + esac + fi # GCC + fi # PIC_FLAGS + AC_MSG_RESULT([$PIC_FLAGS]) +fi +AC_SUBST([PIC_FLAGS]) +])# MESA_PIC_FLAGS |