Commit | Line | Data |
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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 "${$2}" in | |
8 | # PIC is the default on some targets or must not be used. | |
9 | *-*-darwin*) | |
f91ca6bc IB |
10 | # For darwin, common symbols are not allowed in MH_DYLIB files |
11 | case "${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 | |
0913ae5a | 15 | # libs. |
f91ca6bc IB |
16 | *-mdynamic-no-pic*) $1='-fno-common -mno-dynamic-no-pic' ;; |
17 | *) $1=-fno-common ;; | |
18 | esac | |
9a39e741 RO |
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 | ;; | |
2cc10f5b JBG |
26 | i[[34567]]86-*-cygwin* | x86_64-*-cygwin*) |
27 | ;; | |
28 | i[[34567]]86-*-mingw* | x86_64-*-mingw*) | |
9a39e741 | 29 | ;; |
acf89cab | 30 | i[[34567]]86-*-interix[[3-9]]*) |
9a39e741 RO |
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 | ;; | |
9a39e741 RO |
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])]) |