From 48aec0bcc62585f949362e8c875fc039d306cb7f Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Tue, 10 Dec 2002 12:20:47 -0800
Subject: [PATCH] Add support for darwin linker options.

        * config/darwin.h(LINK_SPEC): Add darwin specific linker options.
	* doc/invoke.texi: Add new "Darwin Options" section.

From-SVN: r60010
---
 gcc/ChangeLog       |   4 ++
 gcc/config/darwin.h | 186 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 gcc/doc/invoke.texi | 155 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 342 insertions(+), 3 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3b506ef..112e5a9 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2002-12-10  Devang Patel  <dpatel@appple.com>
+	* config/darwin.h(LINK_SPEC): Add darwin specific linker options.
+	* doc/invoke.texi: Add new "Darwin Options" section.
+	
 2002-12-10  Jim Wilson  <wilson@redhat.com>
 
 	* rs6000.h (RETURN_IN_MEMORY): If ABI_V4, then TFmode is returned in
diff --git a/gcc/config/darwin.h b/gcc/config/darwin.h
index 27ce49f..7997a46 100644
--- a/gcc/config/darwin.h
+++ b/gcc/config/darwin.h
@@ -84,11 +84,184 @@ Boston, MA 02111-1307, USA.  */
 #undef	DEFAULT_PCC_STRUCT_RETURN
 #define DEFAULT_PCC_STRUCT_RETURN 0
 
+/* This table intercepts weirdo options whose names would interfere
+   with normal driver conventions, and either translates them into
+   standardly-named options, or adds a 'Z' so that they can get to
+   specs processing without interference.
+
+   Do not expand a linker option to "-Xlinker -<option>", since that
+   forfeits the ability to control via spec strings later.  However,
+   as a special exception, do this translation with -filelist, because
+   otherwise the driver will think there are no input files and quit.
+   (The alternative would be to hack the driver to recognize -filelist
+   specially, but it's simpler to use the translation table.)
+
+   Note that an option name with a prefix that matches another option
+   name, that also takes an argument, needs to be modified so the
+   prefix is different, otherwise a '*' after the shorter option will
+   match with the longer one.  */
+/* Ignore -dynamic for now */
+#define TARGET_OPTION_TRANSLATE_TABLE \
+  { "-all_load", "-Zall_load" },  \
+  { "-allowable_client", "-Zallowable_client" },  \
+  { "-arch_errors_fatal", "-Zarch_errors_fatal" },  \
+  { "-bind_at_load", "-Zbind_at_load" },  \
+  { "-bundle", "-Zbundle" },  \
+  { "-bundle_loader", "-Zbundle_loader" },  \
+  { "-weak_reference_mismatches", "-Zweak_reference_mismatches" },  \
+  { "-dependency-file", "-MF" }, \
+  { "-dylib_file", "-Zdylib_file" }, \
+  { "-dynamic", " " },  \
+  { "-dynamiclib", "-Zdynamiclib" },  \
+  { "-exported_symbols_list", "-Zexported_symbols_list" },  \
+  { "-seg_addr_table_filename", "-Zseg_addr_table_filename" }, \
+  { "-filelist", "-Xlinker -filelist -Xlinker" },  \
+  { "-flat_namespace", "-Zflat_namespace" },  \
+  { "-force_cpusubtype_ALL", "-Zforce_cpusubtype_ALL" },  \
+  { "-force_flat_namespace", "-Zforce_flat_namespace" },  \
+  { "-image_base", "-Zimage_base" },  \
+  { "-init", "-Zinit" },  \
+  { "-install_name", "-Zinstall_name" },  \
+  { "-multiply_defined_unused", "-Zmultiplydefinedunused" },  \
+  { "-multiply_defined", "-Zmultiply_defined" },  \
+  { "-multi_module", "-Zmulti_module" },  \
+  { "-static", "-static -Wa,-static" },  \
+  { "-single_module", "-Zsingle_module" },  \
+  { "-unexported_symbols_list", "-Zunexported_symbols_list" }
+
+/* These compiler options take n arguments.  */
+
+#undef  WORD_SWITCH_TAKES_ARG
+#define WORD_SWITCH_TAKES_ARG(STR)              \
+  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) ? 1 :    \
+   !strcmp (STR, "Zallowable_client") ? 1 :     \
+   !strcmp (STR, "arch") ? 1 :                  \
+   !strcmp (STR, "arch_only") ? 1 :             \
+   !strcmp (STR, "Zbundle_loader") ? 1 :        \
+   !strcmp (STR, "client_name") ? 1 :           \
+   !strcmp (STR, "compatibility_version") ? 1 : \
+   !strcmp (STR, "current_version") ? 1 :       \
+   !strcmp (STR, "Zdylib_file") ? 1 :           \
+   !strcmp (STR, "Zexported_symbols_list") ? 1 : \
+   !strcmp (STR, "Zimage_base") ? 1 :           \
+   !strcmp (STR, "Zinit") ? 1 :                 \
+   !strcmp (STR, "Zinstall_name") ? 1 :         \
+   !strcmp (STR, "Zmultiplydefinedunused") ? 1 : \
+   !strcmp (STR, "Zmultiply_defined") ? 1 :     \
+   !strcmp (STR, "precomp-trustfile") ? 1 :     \
+   !strcmp (STR, "read_only_relocs") ? 1 :      \
+   !strcmp (STR, "sectcreate") ? 3 :            \
+   !strcmp (STR, "sectorder") ? 3 :             \
+   !strcmp (STR, "Zseg_addr_table_filename") ?1 :\
+   !strcmp (STR, "seg1addr") ? 1 :              \
+   !strcmp (STR, "segprot") ? 3 :               \
+   !strcmp (STR, "seg_addr_table") ? 1 :        \
+   !strcmp (STR, "sub_library") ? 1 :           \
+   !strcmp (STR, "sub_umbrella") ? 1 :          \
+   !strcmp (STR, "umbrella") ? 1 :              \
+   !strcmp (STR, "undefined") ? 1 :             \
+   !strcmp (STR, "Zunexported_symbols_list") ? 1 : \
+   !strcmp (STR, "Zweak_reference_mismatches") ? 1 : \
+   !strcmp (STR, "pagezero_size") ? 1 :         \
+   !strcmp (STR, "segs_read_only_addr") ? 1 :   \
+   !strcmp (STR, "segs_read_write_addr") ? 1 :  \
+   !strcmp (STR, "sectalign") ? 3 :             \
+   !strcmp (STR, "sectobjectsymbols") ? 2 :     \
+   !strcmp (STR, "segcreate") ? 3 :             \
+   !strcmp (STR, "dylinker_install_name") ? 1 : \
+   0)
+
 /* Machine dependent cpp options.  */
 
 #undef	CPP_SPEC
 #define CPP_SPEC "%{static:-D__STATIC__}%{!static:-D__DYNAMIC__}"
 
+/* This is mostly a clone of the standard LINK_COMMAND_SPEC, plus
+   precomp, libtool, and fat build additions.  Also we
+   don't specify a second %G after %L because libSystem is
+   self-contained and doesn't need to link against libgcc.a.  */
+/* In general, random Darwin linker flags should go into LINK_SPEC
+   instead of LINK_COMMAND_SPEC.  The command spec is better for
+   specifying the handling of options understood by generic Unix
+   linkers, and for positional arguments like libraries.  */
+#define LINK_COMMAND_SPEC "\
+%{!fdump=*:%{!fsyntax-only:%{!precomp:%{!c:%{!M:%{!MM:%{!E:%{!S:\
+    %{!Zdynamiclib:%(linker)}%{Zdynamiclib:/usr/bin/libtool} \
+    %l %X %{d} %{s} %{t} %{Z} \
+    %{!Zdynamiclib:%{A} %{e*} %{m} %{N} %{n} %{r} %{u*} %{x} %{z}} \
+    %{@:-o %f%u.out}%{!@:%{o*}%{!o:-o a.out}} \
+    %{!Zdynamiclib:%{!A:%{!nostdlib:%{!nostartfiles:%S}}}} \
+    %{L*} %(link_libgcc) %o %{!nostdlib:%{!nodefaultlibs:%G %L}} \
+    %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} %{F*} \
+    %{!--help:%{!no-c++filt|c++filt:| c++filt3 }} }}}}}}}}"
+
+/* Please keep the random linker options in alphabetical order (modulo
+   'Z' and 'no' prefixes).  Options that can only go to one of libtool
+   or ld must be listed twice, under both !Zdynamiclib and
+   Zdynamiclib, with one of the cases reporting an error.  */
+/* Note that options taking arguments may appear multiple times on a
+   command line with different arguments each time, so put a * after
+   their names so all of them get passed.  */
+#define LINK_SPEC  \
+  "%{static}%{!static:-dynamic} \
+   %{!Zdynamiclib: \
+     %{Zbundle:-bundle} \
+     %{Zbundle_loader*:-bundle_loader %*} \
+     %{client_name*} \
+     %{compatibility_version*:%e-compatibility_version only allowed with -dynamiclib\
+} \
+     %{current_version*:%e-current_version only allowed with -dynamiclib} \
+     %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
+     %{Zforce_flat_namespace:-force_flat_namespace} \
+     %{Zinstall_name*:%e-install_name only allowed with -dynamiclib} \
+     %{keep_private_externs} \
+     %{private_bundle} \
+    } \
+   %{Zdynamiclib: \
+     %{Zbundle:%e-bundle not allowed with -dynamiclib} \
+     %{Zbundle_loader*:%e-bundle_loader not allowed with -dynamiclib} \
+     %{client_name*:%e-client_name not allowed with -dynamiclib} \
+     %{compatibility_version*} \
+     %{current_version*} \
+     %{Zforce_cpusubtype_ALL:%e-force_cpusubtype_ALL not allowed with -dynamiclib} \
+     %{Zforce_flat_namespace:%e-force_flat_namespace not allowed with -dynamiclib} \
+     %{Zinstall_name*:-install_name %*} \
+     %{keep_private_externs:%e-keep_private_externs not allowed with -dynamiclib} \
+     %{private_bundle:%e-private_bundle not allowed with -dynamiclib} \
+    } \
+   %{Zall_load:-all_load}%{Zdynamiclib:%{!Zall_load:-noall_load}} \
+   %{Zallowable_client*:-allowable_client %*} \
+   %{Zbind_at_load:-bind_at_load} \
+   %{Zarch_errors_fatal:-arch_errors_fatal} \
+   %{Zdylib_file*:-dylib_file %*} \
+   %{Zexported_symbols_list*:-exported_symbols_list %*} \
+   %{Zflat_namespace:-flat_namespace} \
+   %{headerpad_max_install_names*} \
+   %{Zimage_base*:-image_base %*} \
+   %{Zinit*:-init %*} \
+   %{nomultidefs} \
+   %{Zmulti_module:-multi_module} %{Zsingle_module:-single_module} \
+   %{Zmultiply_defined*:-multiply_defined %*} \
+   %{Zmultiplydefinedunused*:-multiply_defined_unused %*} \
+   %{prebind} %{noprebind} %{prebind_all_twolevel_modules} \
+   %{read_only_relocs} \
+   %{sectcreate*} %{sectorder*} %{seg1addr*} %{segprot*} %{seg_addr_table*} \
+   %{Zseg_addr_table_filename*:-seg_addr_table_filename %*} \
+   %{sub_library*} %{sub_umbrella*} \
+   %{twolevel_namespace} %{twolevel_namespace_hints} \
+   %{umbrella*} \
+   %{undefined*} \
+   %{Zunexported_symbols_list*:-unexported_symbols_list %*} \
+   %{Zweak_reference_mismatches*:-weak_reference_mismatches %*} \
+   %{X} \
+   %{y*} \
+   %{w} \
+   %{pagezero_size*} %{segs_read_*} %{seglinkedit} %{noseglinkedit}  \
+   %{sectalign*} %{sectobjectsymbols*} %{segcreate*} %{whyload} \
+   %{whatsloaded} %{dylinker_install_name*} \
+   %{dylinker} %{Mach} "
+
+
 /* Machine dependent libraries.  */
 
 #undef	LIB_SPEC
@@ -96,10 +269,17 @@ Boston, MA 02111-1307, USA.  */
 
 /* We specify crt0.o as -lcrt0.o so that ld will search the library path.  */
 
-#undef	STARTFILE_SPEC
+#undef  STARTFILE_SPEC
 #define STARTFILE_SPEC  \
-  "%{pg:%{static:-lgcrt0.o}%{!static:-lgcrt1.o} -lcrt2.o} \
-    %{!pg:%{static:-lcrt0.o}%{!static:-lcrt1.o} -lcrt2.o}"
+  "%{!Zdynamiclib:%{Zbundle:%{!static:-lbundle1.o}} \
+     %{!Zbundle:%{pg:%{static:-lgcrt0.o} \
+                     %{!static:%{object:-lgcrt0.o} \
+                               %{!object:%{preload:-lgcrt0.o} \
+                                 %{!preload:-lgcrt1.o -lcrt2.o}}}} \
+                %{!pg:%{static:-lcrt0.o} \
+                      %{!static:%{object:-lcrt0.o} \
+                                %{!object:%{preload:-lcrt0.o} \
+                                  %{!preload:-lcrt1.o -lcrt2.o}}}}}}"
 
 /* The native Darwin linker doesn't necessarily place files in the order
    that they're specified on the link line.  Thus, it is pointless
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 38aab0d..4589dd1 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -463,6 +463,28 @@ in the following sections.
 -msim  -mmvme  -mads  -myellowknife  -memb -msdata @gol
 -msdata=@var{opt}  -mvxworks -mwindiss -G @var{num} -pthread}
 
+@emph{Darwin Options}
+@gccoptlist{
+-all_load -allowable_client -arch -arch_errors_fatal @gol
+-arch_only -bind_at_load -bundle -bundle_loader @gol
+-client_name -compatibility_version -current_version @gol
+-dependency-file -dylib_file -dylinker_install_name @gol
+-dynamic -dynamiclib -exported_symbols_list @gol
+-filelist -flat_namespace -force_cpusubtype_ALL @gol
+-force_flat_namespace -headerpad_max_install_names @gol
+-image_base -init -install_name -keep_private_externs @gol
+-multi_module -multiply_defined -multiply_defined_unused @gol
+-noall_load -nomultidefs -noprebind -noseglinkedit @gol
+-pagezero_size -prebind -prebind_all_twolevel_modules @gol
+-private_bundle -read_only_relocs -sectalign @gol
+-sectobjectsymbols -whyload -seg1addr @gol
+-sectcreate -sectobjectsymbols -sectorder @gol
+-seg_addr_table -seg_addr_table_filename -seglinkedit @gol
+-segprot -segs_read_only_addr -segs_read_write_addr @gol
+-single_module -static -sub_library -sub_umbrella @gol
+-twolevel_namespace -umbrella -undefined @gol
+-unexported_symbols_list -weak_reference_mismatches -whatsloaded}
+
 @emph{RT Options}
 @gccoptlist{
 -mcall-lib-mul  -mfp-arg-in-fpregs  -mfp-arg-in-gregs @gol
@@ -5202,6 +5224,7 @@ that macro, which enables you to change the defaults.
 * M32R/D Options::
 * M88K Options::
 * RS/6000 and PowerPC Options::
+* Darwin Options::
 * RT Options::
 * MIPS Options::
 * i386 and x86-64 Options::
@@ -7227,6 +7250,138 @@ This option sets flags for both the preprocessor and linker.
 
 @end table
 
+@node Darwin Options
+@subsection Darwin Options
+@cindex Darwin options
+@table @gcctabopt
+@item -all_load    
+@item -allowable_client  
+@item -arch    
+@item -arch_errors_fatal
+@item -arch_only
+@item -bind_at_load
+@item -bundle     
+@item -bundle_loader
+@item -client_name       
+@item -compatibility_version
+@item -current_version    
+@item -dependency-file
+@item -dylib_file    
+@item -dylinker_install_name
+@item -dynamic
+@item -dynamiclib   
+@item -exported_symbols_list  
+@item -filelist
+@item -flat_namespace   
+@item -force_cpusubtype_ALL
+@item -force_flat_namespace   
+@item -headerpad_max_install_names
+@item -image_base  
+@item -init
+@item -install_name
+@item -keep_private_externs
+@item -multi_module
+@item -multiply_defined      
+@item -multiply_defined_unused      
+@item -noall_load  
+@item -nomultidefs
+@item -noprebind     
+@item -noseglinkedit
+@item -pagezero_size    
+@item -prebind
+@item -prebind_all_twolevel_modules
+@item -private_bundle
+@item -read_only_relocs
+@item -sectalign  
+@item -sectobjectsymbols    
+@item -whyload
+@item -seg1addr 
+@item -sectcreate
+@item -sectobjectsymbols
+@item -sectorder
+@item -seg_addr_table
+@item -seg_addr_table_filename
+@item -seglinkedit
+@item -segprot   
+@item -segs_read_only_addr
+@item -segs_read_write_addr
+@item -single_module   
+@item -static
+@item -sub_library
+@item -sub_umbrella 
+@item -twolevel_namespace
+@item -umbrella
+@item -undefined
+@item -unexported_symbols_list
+@item -weak_reference_mismatches
+@item -whatsloaded  
+@opindex all_load   
+@opindex allowable_client
+@opindex arch
+@opindex arch_errors_fatal
+@opindex arch_only    
+@opindex bind_at_load
+@opindex bundle
+@opindex bundle_loader
+@opindex client_name
+@opindex compatibility_version
+@opindex current_version
+@opindex dependency-file
+@opindex dylib_file
+@opindex dylinker_install_name
+@opindex dynamic
+@opindex dynamiclib
+@opindex exported_symbols_list
+@opindex filelist  
+@opindex flat_namespace    
+@opindex force_cpusubtype_ALL
+@opindex force_flat_namespace
+@opindex headerpad_max_install_names
+@opindex image_base
+@opindex init     
+@opindex install_name
+@opindex keep_private_externs
+@opindex multi_module   
+@opindex multiply_defined
+@opindex multiply_defined_unused   
+@opindex noall_load  
+@opindex nomultidefs   
+@opindex noprebind
+@opindex noseglinkedit      
+@opindex pagezero_size
+@opindex prebind
+@opindex prebind_all_twolevel_modules
+@opindex private_bundle 
+@opindex read_only_relocs
+@opindex sectalign   
+@opindex sectobjectsymbols    
+@opindex whyload  
+@opindex seg1addr
+@opindex sectcreate       
+@opindex sectobjectsymbols 
+@opindex sectorder     
+@opindex seg_addr_table
+@opindex seg_addr_table_filename
+@opindex seglinkedit
+@opindex segprot
+@opindex segs_read_only_addr
+@opindex segs_read_write_addr
+@opindex single_module
+@opindex static
+@opindex sub_library
+@opindex sub_umbrella
+@opindex twolevel_namespace
+@opindex umbrella
+@opindex undefined
+@opindex unexported_symbols_list
+@opindex weak_reference_mismatches
+@opindex whatsloaded
+
+This options are available for Darwin linker. Darwin linker man page
+describes them in detail.
+@end table
+
+
 @node RT Options
 @subsection IBM RT Options
 @cindex RT options
-- 
2.7.4