1 # _GCC_PICFLAG(FLAG, DISPATCH)
2 # ----------------------------
3 # Store PIC flag corresponding to DISPATCH triplet in FLAG.
4 # Explit use of -fpic in CFLAGS corresponding to FLAG overrides default.
5 AC_DEFUN([_GCC_PICFLAG], [
8 # PIC is the default on some targets or must not be used.
10 # PIC is the default on this platform
11 # Common symbols not allowed in MH_DYLIB files
12 # Cancel any earlier -mdynamic-no-pic, as that makes
13 # the code not suitable for shared libraries.
14 $1='-fno-common -mno-dynamic-no-pic'
20 # PIC is the default for 64-bit PA HP-UX.
22 i[[34567]]86-*-cygwin* | x86_64-*-cygwin*)
24 i[[34567]]86-*-mingw* | x86_64-*-mingw*)
26 i[[34567]]86-*-interix[[3-9]]*)
27 # Interix 3.x gcc -fpic/-fPIC options generate broken code.
28 # Instead, we relocate shared libraries at runtime.
30 i[[34567]]86-*-nto-qnx*)
31 # QNX uses GNU C++, but need to define -shared option too, otherwise
35 i[[34567]]86-pc-msdosdjgpp*)
36 # DJGPP does not support shared libraries at all.
39 # On IA64 HP-UX, PIC is the default but the pic flag
40 # sets the default TLS model and affects inlining.
46 rs6000-ibm-aix* | powerpc-ibm-aix*)
47 # All AIX code is PIC.
50 # Some targets support both -fPIC and -fpic, but prefer the latter.
52 i[[34567]]86-*-* | x86_64-*-*)
55 # FIXME: Override -fPIC default in libgcc only?
56 sh-*-linux* | sh[[2346lbe]]*-*-linux*)
59 # FIXME: Simplify to sh*-*-netbsd*?
60 sh-*-netbsdelf* | shl*-*-netbsdelf* | sh5-*-netbsd* | sh5l*-*-netbsd* | \
61 sh64-*-netbsd* | sh64l*-*-netbsd*)
64 # Default to -fPIC unless specified otherwise.
70 # If the user explicitly uses -fpic/-fPIC, keep that.
71 case "${m4_bpatsubsts($1, PICFLAG, CFLAGS)}" in
83 # Store host PIC flag in PICFLAG.
84 AC_DEFUN([GCC_PICFLAG], [
85 AC_REQUIRE([AC_CANONICAL_HOST])
86 _GCC_PICFLAG([PICFLAG], [host])])
88 # GCC_PICFLAG_FOR_TARGET
89 # ----------------------
90 # Store target PIC flag in PICFLAG_FOR_TARGET.
91 AC_DEFUN([GCC_PICFLAG_FOR_TARGET], [
92 AC_REQUIRE([AC_CANONICAL_TARGET])
93 _GCC_PICFLAG([PICFLAG_FOR_TARGET], [target])])