diff options
Diffstat (limited to 'config')
| -rw-r--r-- | config/ChangeLog | 15 | ||||
| -rw-r--r-- | config/mh-darwin | 31 | ||||
| -rw-r--r-- | config/picflag.m4 | 12 |
3 files changed, 45 insertions, 13 deletions
diff --git a/config/ChangeLog b/config/ChangeLog index 6ffb0ed1e66..30314370241 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,18 @@ +2015-04-10 Jakub Jelinek <jakub@redhat.com> + Iain Sandoe <iain@codesourcery.com> + + PR target/65351 + * mh-darwin: Only apply -mdynamic-no-pic for m32 Darwin when the + compiler in use supports -mno-dynamic-no-pic. + * picflag.m4: Only append -mno-dynamic-no-pic for Darwin when + -mdynamic-no-pic is present in CFLAGS. + +2015-04-07 Jakub Jelinek <jakub@redhat.com> + Iain Sandoe <iain@codesourcery.com> + + PR target/65351 + * picflag.m4: Append -mno-dynamic-no-pic for Darwin. + 2015-04-02 H.J. Lu <hongjiu.lu@intel.com> * zlib.m4 (AM_ZLIB): Set zlibdir to -L\$(top_builddir)/../zlib diff --git a/config/mh-darwin b/config/mh-darwin index a039f201410..148b73038c3 100644 --- a/config/mh-darwin +++ b/config/mh-darwin @@ -1,18 +1,29 @@ # The -mdynamic-no-pic ensures that the compiler executable is built without # position-independent-code -- the usual default on Darwin. This fix speeds -# compiles by 3-5%. -BOOT_CFLAGS += \ +# compiles by 3-5%. Don't add it if the compiler doesn't also support +# -mno-dynamic-no-pic to undo it. +DARWIN_MDYNAMIC_NO_PIC := \ `case ${host} in i?86-*-darwin* | powerpc-*-darwin*) \ - echo -mdynamic-no-pic ;; esac;` + $(CC) -S -xc /dev/null -o /dev/null -mno-dynamic-no-pic 2>/dev/null \ + && echo -mdynamic-no-pic ;; esac` +DARWIN_GCC_MDYNAMIC_NO_PIC := \ +`case ${host} in i?86-*-darwin* | powerpc-*-darwin*) \ + $(CC) -S -xc /dev/null -o /dev/null -mno-dynamic-no-pic 2>/dev/null \ + || echo -mdynamic-no-pic ;; esac` # ld on Darwin versions >= 10.7 defaults to PIE executables. Disable this for # gcc components, since it is incompatible with our pch implementation. -BOOT_LDFLAGS += \ -`case ${host} in *-*-darwin[1][1-9]*) echo -Wl,-no_pie ;; esac;` +DARWIN_NO_PIE := `case ${host} in *-*-darwin[1][1-9]*) echo -Wl,-no_pie ;; esac;` + +BOOT_CFLAGS += $(DARWIN_MDYNAMIC_NO_PIC) +BOOT_LDFLAGS += $(DARWIN_NO_PIE) # Similarly, for cross-compilation. -STAGE1_CFLAGS += \ -`case ${host} in i?86-*-darwin* | powerpc-*-darwin*)\ - echo -mdynamic-no-pic ;; esac;` -STAGE1_LDFLAGS += \ -`case ${host} in *-*-darwin[1][1-9]*) echo -Wl,-no_pie ;; esac;` +STAGE1_CFLAGS += $(DARWIN_MDYNAMIC_NO_PIC) +STAGE1_LDFLAGS += $(DARWIN_NO_PIE) + +# Without -mno-dynamic-no-pic support, add -mdynamic-no-pic just to later +# stages when we know it is built with gcc. +STAGE2_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC) +STAGE3_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC) +STAGE4_CFLAGS += $(DARWIN_GCC_MDYNAMIC_NO_PIC) diff --git a/config/picflag.m4 b/config/picflag.m4 index 3bcdbf1de30..2f5b9721eb2 100644 --- a/config/picflag.m4 +++ b/config/picflag.m4 @@ -7,9 +7,15 @@ AC_DEFUN([_GCC_PICFLAG], [ case "${$2}" in # PIC is the default on some targets or must not be used. *-*-darwin*) - # PIC is the default on this platform - # Common symbols not allowed in MH_DYLIB files - $1=-fno-common + # For darwin, common symbols are not allowed in MH_DYLIB files + case "${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. |