glapi: Move to src/mapi/.
[mesa.git] / acinclude.m4
1 # A few convenience macros for Mesa, mostly to keep all the platform
2 # specifics out of configure.ac.
3
4 # MESA_PIC_FLAGS()
5 #
6 # Find out whether to build PIC code using the option --enable-pic and
7 # the configure enable_static/enable_shared settings. If PIC is needed,
8 # figure out the necessary flags for the platform and compiler.
9 #
10 # The platform checks have been shamelessly taken from libtool and
11 # stripped down to just what's needed for Mesa. See _LT_COMPILER_PIC in
12 # /usr/share/aclocal/libtool.m4 or
13 # http://git.savannah.gnu.org/gitweb/?p=libtool.git;a=blob;f=libltdl/m4/libtool.m4;hb=HEAD
14 #
15 AC_DEFUN([MESA_PIC_FLAGS],
16 [AC_REQUIRE([AC_PROG_CC])dnl
17 AC_ARG_VAR([PIC_FLAGS], [compiler flags for PIC code])
18 AC_ARG_ENABLE([pic],
19 [AS_HELP_STRING([--disable-pic],
20 [compile PIC objects @<:@default=enabled for shared builds
21 on supported platforms@:>@])],
22 [enable_pic="$enableval"
23 test "x$enable_pic" = x && enable_pic=auto],
24 [enable_pic=auto])
25 # disable PIC by default for static builds
26 if test "$enable_pic" = auto && test "$enable_static" = yes; then
27 enable_pic=no
28 fi
29 # if PIC hasn't been explicitly disabled, try to figure out the flags
30 if test "$enable_pic" != no; then
31 AC_MSG_CHECKING([for $CC option to produce PIC])
32 # allow the user's flags to override
33 if test "x$PIC_FLAGS" = x; then
34 # see if we're using GCC
35 if test "x$GCC" = xyes; then
36 case "$host_os" in
37 aix*|beos*|cygwin*|irix5*|irix6*|osf3*|osf4*|osf5*)
38 # PIC is the default for these OSes.
39 ;;
40 mingw*|os2*|pw32*)
41 # This hack is so that the source file can tell whether
42 # it is being built for inclusion in a dll (and should
43 # export symbols for example).
44 PIC_FLAGS="-DDLL_EXPORT"
45 ;;
46 darwin*|rhapsody*)
47 # PIC is the default on this platform
48 # Common symbols not allowed in MH_DYLIB files
49 PIC_FLAGS="-fno-common"
50 ;;
51 hpux*)
52 # PIC is the default for IA64 HP-UX and 64-bit HP-UX,
53 # but not for PA HP-UX.
54 case $host_cpu in
55 hppa*64*|ia64*)
56 ;;
57 *)
58 PIC_FLAGS="-fPIC"
59 ;;
60 esac
61 ;;
62 *)
63 # Everyone else on GCC uses -fPIC
64 PIC_FLAGS="-fPIC"
65 ;;
66 esac
67 else # !GCC
68 case "$host_os" in
69 hpux9*|hpux10*|hpux11*)
70 # PIC is the default for IA64 HP-UX and 64-bit HP-UX,
71 # but not for PA HP-UX.
72 case "$host_cpu" in
73 hppa*64*|ia64*)
74 # +Z the default
75 ;;
76 *)
77 PIC_FLAGS="+Z"
78 ;;
79 esac
80 ;;
81 linux*|k*bsd*-gnu)
82 case `basename "$CC"` in
83 icc*|ecc*|ifort*)
84 PIC_FLAGS="-KPIC"
85 ;;
86 pgcc*|pgf77*|pgf90*|pgf95*)
87 # Portland Group compilers (*not* the Pentium gcc
88 # compiler, which looks to be a dead project)
89 PIC_FLAGS="-fpic"
90 ;;
91 ccc*)
92 # All Alpha code is PIC.
93 ;;
94 xl*)
95 # IBM XL C 8.0/Fortran 10.1 on PPC
96 PIC_FLAGS="-qpic"
97 ;;
98 *)
99 case `$CC -V 2>&1 | sed 5q` in
100 *Sun\ C*|*Sun\ F*)
101 # Sun C 5.9 or Sun Fortran
102 PIC_FLAGS="-KPIC"
103 ;;
104 esac
105 esac
106 ;;
107 solaris*)
108 PIC_FLAGS="-KPIC"
109 ;;
110 sunos4*)
111 PIC_FLAGS="-PIC"
112 ;;
113 esac
114 fi # GCC
115 fi # PIC_FLAGS
116 AC_MSG_RESULT([$PIC_FLAGS])
117 fi
118 AC_SUBST([PIC_FLAGS])
119 ])# MESA_PIC_FLAGS