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