|
111
|
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], [
|
|
|
6
|
|
|
7 case "${$2}" in
|
|
|
8 # PIC is the default on some targets or must not be used.
|
|
|
9 *-*-darwin*)
|
|
|
10 # For darwin, common symbols are not allowed in MH_DYLIB files
|
|
|
11 case "${CFLAGS}" in
|
|
|
12 # If we are using a compiler supporting mdynamic-no-pic
|
|
|
13 # and the option has been tested as safe to add, then cancel
|
|
|
14 # it here, since the code generated is incompatible with shared
|
|
|
15 # libs.
|
|
|
16 *-mdynamic-no-pic*) $1='-fno-common -mno-dynamic-no-pic' ;;
|
|
|
17 *) $1=-fno-common ;;
|
|
|
18 esac
|
|
|
19 ;;
|
|
|
20 alpha*-dec-osf5*)
|
|
|
21 # PIC is the default.
|
|
|
22 ;;
|
|
|
23 hppa*64*-*-hpux*)
|
|
|
24 # PIC is the default for 64-bit PA HP-UX.
|
|
|
25 ;;
|
|
|
26 i[[34567]]86-*-cygwin* | x86_64-*-cygwin*)
|
|
|
27 ;;
|
|
|
28 i[[34567]]86-*-mingw* | x86_64-*-mingw*)
|
|
|
29 ;;
|
|
|
30 i[[34567]]86-*-interix[[3-9]]*)
|
|
|
31 # Interix 3.x gcc -fpic/-fPIC options generate broken code.
|
|
|
32 # Instead, we relocate shared libraries at runtime.
|
|
|
33 ;;
|
|
|
34 i[[34567]]86-*-nto-qnx*)
|
|
|
35 # QNX uses GNU C++, but need to define -shared option too, otherwise
|
|
|
36 # it will coredump.
|
|
|
37 $1='-fPIC -shared'
|
|
|
38 ;;
|
|
|
39 i[[34567]]86-pc-msdosdjgpp*)
|
|
|
40 # DJGPP does not support shared libraries at all.
|
|
|
41 ;;
|
|
|
42 ia64*-*-hpux*)
|
|
|
43 # On IA64 HP-UX, PIC is the default but the pic flag
|
|
|
44 # sets the default TLS model and affects inlining.
|
|
|
45 $1=-fPIC
|
|
|
46 ;;
|
|
|
47 mips-sgi-irix6*)
|
|
|
48 # PIC is the default.
|
|
|
49 ;;
|
|
|
50 rs6000-ibm-aix* | powerpc-ibm-aix*)
|
|
|
51 # All AIX code is PIC.
|
|
|
52 ;;
|
|
|
53
|
|
|
54 # Some targets support both -fPIC and -fpic, but prefer the latter.
|
|
|
55 # FIXME: Why?
|
|
|
56 i[[34567]]86-*-* | x86_64-*-*)
|
|
|
57 $1=-fpic
|
|
|
58 ;;
|
|
|
59 # FIXME: Override -fPIC default in libgcc only?
|
|
|
60 sh-*-linux* | sh[[2346lbe]]*-*-linux*)
|
|
|
61 $1=-fpic
|
|
|
62 ;;
|
|
|
63 # FIXME: Simplify to sh*-*-netbsd*?
|
|
|
64 sh-*-netbsdelf* | shl*-*-netbsdelf* | sh5-*-netbsd* | sh5l*-*-netbsd* | \
|
|
|
65 sh64-*-netbsd* | sh64l*-*-netbsd*)
|
|
|
66 $1=-fpic
|
|
|
67 ;;
|
|
|
68 # Default to -fPIC unless specified otherwise.
|
|
|
69 *)
|
|
|
70 $1=-fPIC
|
|
|
71 ;;
|
|
|
72 esac
|
|
|
73
|
|
|
74 # If the user explicitly uses -fpic/-fPIC, keep that.
|
|
|
75 case "${m4_bpatsubsts($1, PICFLAG, CFLAGS)}" in
|
|
|
76 *-fpic*)
|
|
|
77 $1=-fpic
|
|
|
78 ;;
|
|
|
79 *-fPIC*)
|
|
|
80 $1=-fPIC
|
|
|
81 ;;
|
|
|
82 esac
|
|
|
83 ])
|
|
|
84
|
|
|
85 # GCC_PICFLAG
|
|
|
86 # -----------
|
|
|
87 # Store host PIC flag in PICFLAG.
|
|
|
88 AC_DEFUN([GCC_PICFLAG], [
|
|
|
89 AC_REQUIRE([AC_CANONICAL_HOST])
|
|
|
90 _GCC_PICFLAG([PICFLAG], [host])])
|
|
|
91
|
|
|
92 # GCC_PICFLAG_FOR_TARGET
|
|
|
93 # ----------------------
|
|
|
94 # Store target PIC flag in PICFLAG_FOR_TARGET.
|
|
|
95 AC_DEFUN([GCC_PICFLAG_FOR_TARGET], [
|
|
|
96 AC_REQUIRE([AC_CANONICAL_TARGET])
|
|
|
97 _GCC_PICFLAG([PICFLAG_FOR_TARGET], [target])])
|
