| # _GCC_PICFLAG(FLAG, DISPATCH) |
| # ---------------------------- |
| # Store PIC flag corresponding to DISPATCH triplet in FLAG. |
| # Explit use of -fpic in CFLAGS corresponding to FLAG overrides default. |
| AC_DEFUN([_GCC_PICFLAG], [ |
| |
| case "${$2}" in |
| # PIC is the default on some targets or must not be used. |
| *-*-darwin*) |
| # For darwin, common symbols are not allowed in MH_DYLIB files |
| case "${CFLAGS}" in |
| # If we are using a compiler supporting mdynamic-no-pic |
| # and the option has been tested as safe to add, then cancel |
| # it here, since the code generated is incompatible with shared |
| # libs. |
| *-mdynamic-no-pic*) $1='-fno-common -mno-dynamic-no-pic' ;; |
| *) $1=-fno-common ;; |
| esac |
| ;; |
| alpha*-dec-osf5*) |
| # PIC is the default. |
| ;; |
| hppa*64*-*-hpux*) |
| # PIC is the default for 64-bit PA HP-UX. |
| ;; |
| i[[34567]]86-*-cygwin* | x86_64-*-cygwin*) |
| ;; |
| i[[34567]]86-*-mingw* | x86_64-*-mingw*) |
| ;; |
| i[[34567]]86-*-interix[[3-9]]*) |
| # Interix 3.x gcc -fpic/-fPIC options generate broken code. |
| # Instead, we relocate shared libraries at runtime. |
| ;; |
| i[[34567]]86-*-nto-qnx*) |
| # QNX uses GNU C++, but need to define -shared option too, otherwise |
| # it will coredump. |
| $1='-fPIC -shared' |
| ;; |
| i[[34567]]86-pc-msdosdjgpp*) |
| # DJGPP does not support shared libraries at all. |
| ;; |
| ia64*-*-hpux*) |
| # On IA64 HP-UX, PIC is the default but the pic flag |
| # sets the default TLS model and affects inlining. |
| $1=-fPIC |
| ;; |
| loongarch*-*-*) |
| $1=-fpic |
| ;; |
| mips-sgi-irix6*) |
| # PIC is the default. |
| ;; |
| rs6000-ibm-aix* | powerpc-ibm-aix*) |
| # All AIX code is PIC. |
| ;; |
| |
| # Some targets support both -fPIC and -fpic, but prefer the latter. |
| # FIXME: Why? |
| i[[34567]]86-*-* | x86_64-*-*) |
| $1=-fpic |
| ;; |
| # FIXME: Override -fPIC default in libgcc only? |
| sh-*-linux* | sh[[2346lbe]]*-*-linux*) |
| $1=-fpic |
| ;; |
| sh*-*-netbsd*) |
| $1=-fpic |
| ;; |
| # Default to -fPIC unless specified otherwise. |
| *) |
| $1=-fPIC |
| ;; |
| esac |
| |
| # If the user explicitly uses -fpic/-fPIC, keep that. |
| case "${m4_bpatsubsts($1, PICFLAG, CFLAGS)}" in |
| *-fpic*) |
| $1=-fpic |
| ;; |
| *-fPIC*) |
| $1=-fPIC |
| ;; |
| esac |
| ]) |
| |
| # GCC_PICFLAG |
| # ----------- |
| # Store host PIC flag in PICFLAG. |
| AC_DEFUN([GCC_PICFLAG], [ |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| _GCC_PICFLAG([PICFLAG], [host])]) |
| |
| # GCC_PICFLAG_FOR_TARGET |
| # ---------------------- |
| # Store target PIC flag in PICFLAG_FOR_TARGET. |
| AC_DEFUN([GCC_PICFLAG_FOR_TARGET], [ |
| AC_REQUIRE([AC_CANONICAL_TARGET]) |
| _GCC_PICFLAG([PICFLAG_FOR_TARGET], [target])]) |