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9a39e741 RO |
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 | # PIC is the default on this platform | |
11 | # Common symbols not allowed in MH_DYLIB files | |
12 | $1=-fno-common | |
13 | ;; | |
14 | alpha*-dec-osf5*) | |
15 | # PIC is the default. | |
16 | ;; | |
17 | hppa*64*-*-hpux*) | |
18 | # PIC is the default for 64-bit PA HP-UX. | |
19 | ;; | |
20 | i[[34567]]86-*-cygwin* | i[[34567]]86-*-mingw* | x86_64-*-mingw*) | |
21 | ;; | |
22 | i[[34567]]86-*-interix3*) | |
23 | # Interix 3.x gcc -fpic/-fPIC options generate broken code. | |
24 | # Instead, we relocate shared libraries at runtime. | |
25 | ;; | |
26 | i[[34567]]86-*-nto-qnx*) | |
27 | # QNX uses GNU C++, but need to define -shared option too, otherwise | |
28 | # it will coredump. | |
29 | $1='-fPIC -shared' | |
30 | ;; | |
31 | i[[34567]]86-pc-msdosdjgpp*) | |
32 | # DJGPP does not support shared libraries at all. | |
33 | ;; | |
34 | ia64*-*-hpux*) | |
35 | # On IA64 HP-UX, PIC is the default but the pic flag | |
36 | # sets the default TLS model and affects inlining. | |
37 | $1=-fPIC | |
38 | ;; | |
39 | mips-sgi-irix6*) | |
40 | # PIC is the default. | |
41 | ;; | |
42 | rs6000-ibm-aix* | powerpc-ibm-aix*) | |
43 | # All AIX code is PIC. | |
44 | ;; | |
45 | ||
46 | # Some targets support both -fPIC and -fpic, but prefer the latter. | |
47 | # FIXME: Why? | |
48 | i[[34567]]86-*-* | x86_64-*-*) | |
49 | $1=-fpic | |
50 | ;; | |
51 | m68k-*-*) | |
52 | $1=-fpic | |
53 | ;; | |
54 | s390*-*-*) | |
55 | $1=-fpic | |
56 | ;; | |
57 | # FIXME: Override -fPIC default in libgcc only? | |
58 | sh-*-linux* | sh[[2346lbe]]*-*-linux*) | |
59 | $1=-fpic | |
60 | ;; | |
61 | # FIXME: Simplify to sh*-*-netbsd*? | |
62 | sh-*-netbsdelf* | shl*-*-netbsdelf* | sh5-*-netbsd* | sh5l*-*-netbsd* | \ | |
63 | sh64-*-netbsd* | sh64l*-*-netbsd*) | |
64 | $1=-fpic | |
65 | ;; | |
66 | # Default to -fPIC unless specified otherwise. | |
67 | *) | |
68 | $1=-fPIC | |
69 | ;; | |
70 | esac | |
71 | ||
72 | # If the user explicitly uses -fpic/-fPIC, keep that. | |
73 | case "${m4_bpatsubsts($1, PICFLAG, CFLAGS)}" in | |
74 | *-fpic*) | |
75 | $1=-fpic | |
76 | ;; | |
77 | *-fPIC*) | |
78 | $1=-fPIC | |
79 | ;; | |
80 | esac | |
81 | ]) | |
82 | ||
83 | # GCC_PICFLAG | |
84 | # ----------- | |
85 | # Store host PIC flag in PICFLAG. | |
86 | AC_DEFUN([GCC_PICFLAG], [ | |
87 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
88 | _GCC_PICFLAG([PICFLAG], [host])]) | |
89 | ||
90 | # GCC_PICFLAG_FOR_TARGET | |
91 | # ---------------------- | |
92 | # Store target PIC flag in PICFLAG_FOR_TARGET. | |
93 | AC_DEFUN([GCC_PICFLAG_FOR_TARGET], [ | |
94 | AC_REQUIRE([AC_CANONICAL_TARGET]) | |
95 | _GCC_PICFLAG([PICFLAG_FOR_TARGET], [target])]) |