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gcc2: Allow the user to build non-PI executables

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This aligns legacy gcc with the changes to gcc4 committed in 4192115 and
the two subsequent commits.  It also disables legacy ld's default
behaviour of recursively resolving shared-library dependencies at link
time, preventing missing-library warnings during the build and aligning
ld's behaviour with that of more recent versions.

gcc2:

* CPP_SPEC: Replace non-existent command-line options with valid
  equivalents.
* CC1_SPEC: Remove non-existent "no-fpic" option; add "fno-pic" and
  "fno-PIC" as options that disable the generation of
  position-independent code; use "-fPIC" by default.
* LINK_SPEC: Pass "-shared" to the linker only if it was passed to gcc;
  output position-independent executables by default, exporting all
  symbols to match the behaviour of "-shared"; when building a
  dynamically linked executable, do not recursively add shared libraries
  as dependencies but do allow unresolved symbols in them; specify
  "-Bsymbolic" only when building a shared library.
* All: Wrap lines at 80 columns; use more compact notation where
  available.

ld:

* Do not recursively resolve shared-library dependencies when building
  an executable if the "--no-add-needed" and "--allow-shlib-undefined"
  options are in effect.  This effectively backports binutils commits
  8fbb09e and 4706eab.

Signed-off-by: Jérôme Duval <jerome.duval@gmail.com>
This commit is contained in:
Simon South 2015-10-30 13:28:32 -04:00 committed by Jérôme Duval
parent a0d6e40ddd
commit 465fb4d4a7
2 changed files with 17 additions and 4 deletions
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7
legacy/binutils/ld/emultempl/elf32.em
View File

@ -891,6 +891,13 @@ gld${EMULATION_NAME}_after_open (void)
&& (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0)
continue;
/* Skip the lib if --no-add-needed and --allow-shlib-undefined
is in effect. */
if (l->by != NULL
&& link_info.unresolved_syms_in_shared_libs == RM_IGNORE
&& (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0)
continue;
/* If we've already seen this file, skip it. */
for (ll = needed; ll != l; ll = ll->next)
if ((ll->by == NULL

14
legacy/gcc/gcc/config/i386/haiku.h
View File

@ -163,14 +163,16 @@ Boston, MA 02111-1307, USA. */
-Asystem(haiku)"
#undef CPP_SPEC
#define CPP_SPEC "%(cpp_cpu) %{!no-fPIC:%{!no-fpic:-D__PIC__ -D__pic__}}"
#define CPP_SPEC "%(cpp_cpu) %{!fno-pic:%{!fno-PIC:-D__PIC__ -D__pic__}}"
/* Haiku uses lots of multichars, so don't warn about them unless the
user explicitly asks for the warnings with -Wmultichar. Note that
CC1_SPEC is used for both cc1 and cc1plus. */
#undef CC1_SPEC
#define CC1_SPEC "%{!no-fpic:%{!fPIC:-fpic}} %{!Wmultichar: -Wno-multichar} %(cc1_cpu) %{profile:-p}"
#define CC1_SPEC \
"%{!fpic:%{!fPIC:%{!fno-pic:%{!fno-PIC:-fPIC}}}} \
%{!Wmultichar: -Wno-multichar} %(cc1_cpu) %{profile:-p}"
#undef CC1PLUS_SPEC
#define CC1PLUS_SPEC "%{!Wctor-dtor-privacy:-Wno-ctor-dtor-privacy}"
@ -183,8 +185,12 @@ Boston, MA 02111-1307, USA. */
/* If ELF is the default format, we should not use /lib/elf. */
#undef LINK_SPEC
#define LINK_SPEC "%{!o*:-o %b} -m elf_i386_haiku %{!r:-shared} -Bsymbolic " \
"%{nostart:-e 0} %{shared:-e 0} %{!shared: %{!nostart: --no-undefined}}"
#define LINK_SPEC \
"%{!o*:-o %b} -m elf_i386_haiku \
%{!shared:%{!r:%{!fno-pic:%{!fno-PIC:-pie --export-dynamic}} \
%{!static:--no-add-needed --allow-shlib-undefined}}} \
%{shared:-shared -Bsymbolic} %{nostart|shared:-e 0} \
%{!nostart:%{!shared:--no-undefined}}"
/* Provide start and end file specs appropriate to glibc. */