[thirdparty/gcc.git] / gcc / README.X11

[This file contains two alternative recipes for compiling X11 with GCC.
The first alternative puts libgcc.a into the shared X library; the second
does not.  Neither alternative works on all kinds of systems.
It may be that when using GCC 2.4, both alternatives work okay on 
relatively recent Sparc systems.  The first alternative is likely
not to work on a Sun 3 without hardware floating point.]

How to compile X11R5 (patch level 11) with GCC version 2:

The patches include support for building the shared libraries with GCC
2 on the Sparc and 68k machines.  This version includes the necessary
parts of libgcc.a in the shared library for X, in case functions in
that library need it.  Thus the default behavior is now to build
everything, including the libraries, with gcc.

If you build the shared library this way, it may not work with 
executables made with older versions of GCC (2.3.3 and earlier).
If that happens, relink those executables with the latest GCC.
IF YOU THINK YOU MIGHT COMPILE X FOR SOLARIS 2, then you really don't
need this patch: get /contrib/R5.SunOS5.patch.tar.Z from
export.lcs.mit.edu instead.  It has everything you need to do the
build for Solaris 2, sets you up to everything with GCC, and is
backward compatible with SunOS 4.*.  Get the README
(/contrib/R5.SunOS5.patch.README at export) for more info.

If you see undefined symbols _dlopen, _dlsym, or _dlclose when linking
with -lX11, compile and link against the file mit/util/misc/dlsym.c in
the MIT X11R5 distribution.  Alternatively, do dynamic linking
by using a non-GNU ld.

mit/config/Imake.tmpl -- Do not set -fstrength-reduce if we have GCC 2.
If -fstrength-reduce (or any other -f option) is a major win, then it
will most likely be turned on by -O2 optimization.

mit/config/sunLib.rules -- If HasGcc and GccVersion > 1 are true, then
use gcc -fpic to generate PIC code.  Make sure that gcc does not use
gas (the GNU assembler) when compiling PIC code; gas does not assemble
it correctly.

***If you have gas installed where gcc uses it by default, you might have
to add -B/bin/ to the PositionIndependentCFlags.***

mit/config/site.def -- Define GccVersion to be 2.

mit/config/sun.cf -- When compiling with GCC 2, use -O2 optimization.

mit/config/sunLib.rules -- When compiling with GCC 2, use -fpic for
position independent code generation.

mit/rgb/Imakefile -- No longer need to compile some modules with 
cc on the Sparc since GCC 2 produces proper -fpcc-struct-return code.

mit/server/os/Imakefile -- Likewise.

mit/server/ddx/sun/Imakefile -- When compiling with GCC 2, some modules
should be compiled with -fvolatile.

mit/clients/twm/Imakefile -- Fix bad decls of malloc, realloc in gram.c.

mit/lib/X/Imakefile -- Make libgcc.a a required lib for libX11.so

*** mit/clients/twm/Imakefile	Mon May 17 22:05:22 1993
--- new/clients/twm/Imakefile	Mon May 17 22:28:46 1993
***************
*** 32,41 ****
--- 32,48 ----
  ComplexProgramTarget(twm)
  InstallNonExecFile(system.twmrc,$(TWMDIR))
  
+ #if HasGcc && GccVersion > 1 && defined (SunArchitecture)
  gram.h gram.c: gram.y
  	yacc $(YFLAGS) gram.y
+ 	sed -e 's/^extern char \*malloc(), \*realloc();//g' y.tab.c >gram.c
+ 	$(MV) y.tab.h gram.h
+ #else
+ gram.h gram.c: gram.y
+ 	yacc $(YFLAGS) gram.y
  	$(MV) y.tab.c gram.c
  	$(MV) y.tab.h gram.h
+ #endif
  
  clean::
  	$(RM) y.tab.h y.tab.c lex.yy.c gram.h gram.c lex.c deftwmrc.c 
*** mit/config/Imake.tmpl	Mon May 17 22:02:57 1993
--- new/config/Imake.tmpl	Mon May 17 22:15:06 1993
***************
*** 500,506 ****
--- 500,510 ----
  #endif
  #ifndef CcCmd
  #if HasGcc
+ #if GccVersion > 1
+ #define CcCmd gcc -fpcc-struct-return
+ #else
  #define CcCmd gcc -fstrength-reduce -fpcc-struct-return 
+ #endif
  #else
  #define CcCmd cc
  #endif
*** mit/config/site.def	Mon May 17 22:02:44 1993
--- new/config/site.def	Mon May 17 22:22:28 1993
***************
*** 25,31 ****
  
  #ifdef BeforeVendorCF
  
! /* #define HasGcc YES */
  
  #endif /* BeforeVendorCF */
  
--- 25,33 ----
  
  #ifdef BeforeVendorCF
  
! #define HasGcc YES
! /* GccVersion > 1 implies building shared libraries with gcc */
! #define GccVersion 2
  
  #endif /* BeforeVendorCF */
  
*** mit/config/sun.cf	Mon May 17 22:03:02 1993
--- new/config/sun.cf	Mon May 17 22:24:55 1993
***************
*** 41,49 ****
--- 41,55 ----
  
  #if HasGcc
  
+ #if GccVersion > 1
+ #define OptimizedCDebugFlags -O2
+ #else
+ #define OptimizedCDebugFlags -O
  #define SharedLibraryCcCmd cc
  #define ExtraLoadFlags -B/usr/bin/
  #define AllocateLocalDefines /**/
+ #endif
+ 
  
  .c.o:
  	$(CC) -c $(CFLAGS) $*.c
*** mit/config/sunLib.rules	Mon May 17 22:02:46 1993
--- new/config/sunLib.rules	Mon May 17 22:19:06 1993
***************
*** 23,29 ****
--- 23,33 ----
  #define SharedLibraryLoadFlags -assert pure-text
  #endif
  #ifndef PositionIndependentCFlags
+ #if defined(HasGcc) && GccVersion > 1
+ #define PositionIndependentCFlags -fpic
+ #else
  #define PositionIndependentCFlags -pic
+ #endif
  #endif
  
  /*
*** mit/lib/X/Imakefile	Mon May 17 22:05:03 1993
--- new/lib/X/Imakefile	Mon May 17 22:32:26 1993
***************
*** 9,14 ****
--- 9,31 ----
  #define MotifBC NO
  #endif
  
+ #if defined(SunArchitecture)
+ #if SystemV4
+ #if HasGcc
+ REQUIREDLIBS= -lgcc -lc
+ #else
+ REQUIREDLIBS= -lc
+ #endif
+ #else
+ #if HasGcc && GccVersion > 1
+ XCOMM Hack to fix gcc 2 ``-nostdlib'' deficiency on SunOS 4.x
+ REQUIREDLIBS= `gcc -v 2>&1 | awk '{print $$4}' | sed -e 's/specs$$/libgcc.a/'`
+ #else
+ REQUIREDLIBS=
+ #endif
+ #endif
+ #endif
+ 
  #ifndef BuildXimp
  #define BuildXimp NO
  #endif
*** mit/rgb/Imakefile	Mon May 17 22:05:31 1993
--- new/rgb/Imakefile	Mon May 17 22:25:30 1993
***************
*** 17,23 ****
  #if !(defined(SGIArchitecture) || SystemV4)
         DBMLIB = -ldbm
  #endif
! #if defined(SparcArchitecture) && HasGcc
             CC = cc
      CCOPTIONS = /**/
      EXTRA_LOAD_FLAGS = /**/
--- 17,23 ----
  #if !(defined(SGIArchitecture) || SystemV4)
         DBMLIB = -ldbm
  #endif
! #if defined(SparcArchitecture) && HasGcc && GccVersion <= 1
             CC = cc
      CCOPTIONS = /**/
      EXTRA_LOAD_FLAGS = /**/
*** mit/server/ddx/sun/Imakefile	Mon May 17 22:05:57 1993
--- new/server/ddx/sun/Imakefile	Mon May 17 22:27:23 1993
***************
*** 43,48 ****
--- 43,53 ----
  LinkFile(sunGX.o,sunGX.o.dist)
  #endif
  
+ #if HasGcc && GccVersion > 1
+ SpecialObjectRule(sunCG2C.o,sunCG2C.c,-fvolatile)
+ SpecialObjectRule(sunCG2M.o,sunCG2M.c,-fvolatile)
+ #endif
+ 
  sunInitExtMono.o: $(ICONFIGFILES)
  ObjectFromSpecialSource(sunInitExtMono,../mi/miinitext,-UPEXEXT)
  ObjectFromSpecialSource(sunInitMono,sunInit,-DMONO_ONLY)
*** mit/server/os/Imakefile	Mon May 17 22:05:46 1993
--- new/server/os/Imakefile	Mon May 17 22:26:02 1993
***************
*** 132,138 ****
  SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES))
  SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES))
  SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES))
! #if defined(SparcArchitecture) && HasGcc
  oscolor.o: $(ICONFIGFILES)
  	$(RM) $@
  	cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c
--- 132,138 ----
  SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES))
  SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES))
  SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES))
! #if defined(SparcArchitecture) && HasGcc && GccVersion <= 1
  oscolor.o: $(ICONFIGFILES)
  	$(RM) $@
  	cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c

\f
[This is the older version]

How to compile X11R5 (patch level 11) with GCC version 2:

The patches include support for building the shared libraries with GCC 2 on 
the Sparc and 68k machines.

NOTE: Such shared libraries built with GCC version 2.3 DID NOT WORK
with executables previously linked using Sun CC!  This is because
neither those executables nor the gcc-compiled shared libraries contain
libgcc.a.  The shared libraries did work with executables linked using
GCC (running the Sun linker, of course) because GCC tells the linker to
link in libgcc.a.  Because of these limitations the default behavior is
to NOT build the shared libraries with gcc.

Changes in GCC 2.4 seem to have eliminated the problem, and such a
shared library now seems work with all executables.  If you want the
gcc-compiled shared libraries turn on "Gcc2BuildLibs" in site.def.  If
you try this, please tell bug-gcc@prep.ai.mit.edu whether it works.

Sun forgot to include a static version of libdl.a with some versions
of SunOS (4.1 mainly).  If you see undefined symbols _dlopen, _dlsym,
or _dlclose when linking with -lX11, compile and link against the file
mit/util/misc/dlsym.c in the MIT X11R5 distribution.

mit/config/Imake.tmpl -- Do not set -fstrength-reduce if we have GCC 2.  If
-fstrength-reduce (or any other -f option) is a major win, then it will
most likely be turned on by -O2 optimization.

mit/config/sunLib.rules -- If HasGcc2 and Gcc2BuildLibs are defined, then 
use gcc -fpic to generate PIC code.  Make sure that gcc does not use gas (the 
GNU assembler) when compiling PIC code; gas does not assemble it correctly.  
If you have gas installed where gcc uses it by default, you might have to add
-B/bin/ to the PositionIndependentCFlags.

mit/config/site.def -- Define HasGcc2 to be YES.

mit/config/sun.cf -- When compiling with GCC 2, use -O2 optimization.

mit/rgb/Imakefile -- No longer need to compile some modules with 
cc on the Sparc since GCC 2 produces proper -fpcc-struct-return code.

mit/server/os/Imakefile -- Likewise.

mit/clients/twm/Imakefile -- fix bad decls of malloc, realloc in gram.c.

*** mit/config/Imake.tmpl.ORIG	Tue Dec 31 11:07:56 1991
--- mit/config/Imake.tmpl	Tue Dec 31 12:30:47 1991
***************
*** 499,508 ****
--- 499,512 ----
  #define HasGcc NO
  #endif
  #ifndef CcCmd
+ #if HasGcc2
+ #define CcCmd gcc -fpcc-struct-return
+ #else
  #if HasGcc
  #define CcCmd gcc -fstrength-reduce -fpcc-struct-return 
  #else
  #define CcCmd cc
+ #endif
  #endif
  #endif
  #if HasFortran
*** mit/config/sunLib.rules.ORIG	Tue Dec 31 11:11:24 1991
--- mit/config/sunLib.rules	Tue May  5 12:26:12 1992
***************
*** 23,30 ****
--- 23,34 ----
  #define SharedLibraryLoadFlags -assert pure-text
  #endif
  #ifndef PositionIndependentCFlags
+ #if defined(HasGcc2) && defined (Gcc2BuildLibs)
+ #define PositionIndependentCFlags -fpic
+ #else
  #define PositionIndependentCFlags -pic
  #endif
+ #endif
  
  /*
   * InstallSharedLibrary - generate rules to install the shared library.
*** mit/config/site.def.ORIG	Tue Dec 31 11:13:49 1991
--- mit/config/site.def	Tue Dec 31 12:02:59 1991
***************
*** 25,31 ****
  
  #ifdef BeforeVendorCF
  
! /* #define HasGcc YES */
  
  #endif /* BeforeVendorCF */
  
--- 25,33 ----
  
  #ifdef BeforeVendorCF
  
! #define HasGcc YES 
! #define HasGcc2 YES
! /* #define Gcc2BuildLibs YES */
  
  #endif /* BeforeVendorCF */
  
*** mit/config/sun.cf.ORIG	Tue Dec 31 11:13:57 1991
--- mit/config/sun.cf	Tue May  5 12:29:50 1992
***************
*** 34,42 ****
--- 41,61 ----
  
  #if HasGcc
  
+ #if defined(HasGcc2) 
+ #define OptimizedCDebugFlags -O2 
+ /* Leave Alone XXX */
+ #else 
+ #define OptimizedCDebugFlags -O
  #define SharedLibraryCcCmd cc
  #define ExtraLoadFlags -B/usr/bin/
  #define AllocateLocalDefines /**/
+ #endif
+ 
+ #if !defined(Gcc2BuildLibs)
+ #define SharedLibraryCcCmd cc
+ #define ExtraLoadFlags -B/usr/bin/
+ #define AllocateLocalDefines /**/
+ #endif
  
  .c.o:
  	$(CC) -c $(CFLAGS) $*.c
*** mit/rgb/Imakefile.ORIG	Wed Jan 15 16:43:18 1992
--- mit/rgb/Imakefile	Thu Jan  2 13:34:09 1992
***************
*** 17,23 ****
  #if !(defined(SGIArchitecture) || SystemV4)
         DBMLIB = -ldbm
  #endif
! #if defined(SparcArchitecture) && HasGcc
             CC = cc
      CCOPTIONS = /**/
      EXTRA_LOAD_FLAGS = /**/
--- 17,23 ----
  #if !(defined(SGIArchitecture) || SystemV4)
         DBMLIB = -ldbm
  #endif
! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2)
             CC = cc
      CCOPTIONS = /**/
      EXTRA_LOAD_FLAGS = /**/
*** mit/server/os/Imakefile.ORIG	Wed Jan 15 16:46:23 1992
--- mit/server/os/Imakefile	Wed Jan 15 16:46:48 1992
***************
*** 132,138 ****
  SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES))
  SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES))
  SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES))
! #if defined(SparcArchitecture) && HasGcc
  oscolor.o: $(ICONFIGFILES)
  	$(RM) $@
  	cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c
--- 132,138 ----
  SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES))
  SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES))
  SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES))
! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2)
  oscolor.o: $(ICONFIGFILES)
  	$(RM) $@
  	cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c
*** 1.1 1992/09/08 19:52:07
--- mit/server/ddx/sun/Imakefile        1992/09/08 21:10:22
***************
*** 43,48 ****
--- 43,53 ----
  LinkFile(sunGX.o,sunGX.o.dist)
  #endif

+ #if HasGcc2
+ SpecialObjectRule(sunCG2C.o,sunCG2C.c,-fvolatile)
+ SpecialObjectRule(sunCG2M.o,sunCG2M.c,-fvolatile)
+ #endif
+ 
  sunInitExtMono.o: $(ICONFIGFILES)
  ObjectFromSpecialSource(sunInitExtMono,../mi/miinitext,-UPEXEXT)
  ObjectFromSpecialSource(sunInitMono,sunInit,-DMONO_ONLY)

*** /tmp/RCSAa24446     Tue Sep 15 12:23:32 1992
--- mit/clients/twm/Imakefile   Thu Aug 13 18:18:07 1992
***************
*** 32,41 ****
--- 32,48 ----
  ComplexProgramTarget(twm)
  InstallNonExecFile(system.twmrc,$(TWMDIR))
  
+ #if HasGcc2 && defined (SunArchitecture)
  gram.h gram.c: gram.y
        yacc $(YFLAGS) gram.y
+       sed -e 's/^extern char \*malloc(), \*realloc();//g' y.tab.c >gram.c
+       $(MV) y.tab.h gram.h
+ #else
+ gram.h gram.c: gram.y
+       yacc $(YFLAGS) gram.y
        $(MV) y.tab.c gram.c
        $(MV) y.tab.h gram.h
+ #endif
  
  clean::
        $(RM) y.tab.h y.tab.c lex.yy.c gram.h gram.c lex.c deftwmrc.c
Commit	Line	Data
7594d3df RS	1	[This file contains two alternative recipes for compiling X11 with GCC.
	2	The first alternative puts libgcc.a into the shared X library; the second
	3	does not. Neither alternative works on all kinds of systems.
	4	It may be that when using GCC 2.4, both alternatives work okay on
	5	relatively recent Sparc systems. The first alternative is likely
	6	not to work on a Sun 3 without hardware floating point.]
	7
	8	How to compile X11R5 (patch level 11) with GCC version 2:
	9
	10	The patches include support for building the shared libraries with GCC
	11	2 on the Sparc and 68k machines. This version includes the necessary
	12	parts of libgcc.a in the shared library for X, in case functions in
	13	that library need it. Thus the default behavior is now to build
	14	everything, including the libraries, with gcc.
	15
	16	If you build the shared library this way, it may not work with
	17	executables made with older versions of GCC (2.3.3 and earlier).
	18	If that happens, relink those executables with the latest GCC.
	19	IF YOU THINK YOU MIGHT COMPILE X FOR SOLARIS 2, then you really don't
	20	need this patch: get /contrib/R5.SunOS5.patch.tar.Z from
	21	export.lcs.mit.edu instead. It has everything you need to do the
	22	build for Solaris 2, sets you up to everything with GCC, and is
38e01259	23	backward compatible with SunOS 4.*. Get the README
7594d3df RS	24	(/contrib/R5.SunOS5.patch.README at export) for more info.
	25
	26	If you see undefined symbols _dlopen, _dlsym, or _dlclose when linking
	27	with -lX11, compile and link against the file mit/util/misc/dlsym.c in
	28	the MIT X11R5 distribution. Alternatively, do dynamic linking
	29	by using a non-GNU ld.
	30
	31	mit/config/Imake.tmpl -- Do not set -fstrength-reduce if we have GCC 2.
	32	If -fstrength-reduce (or any other -f option) is a major win, then it
	33	will most likely be turned on by -O2 optimization.
	34
	35	mit/config/sunLib.rules -- If HasGcc and GccVersion > 1 are true, then
	36	use gcc -fpic to generate PIC code. Make sure that gcc does not use
	37	gas (the GNU assembler) when compiling PIC code; gas does not assemble
	38	it correctly.
	39
	40	***If you have gas installed where gcc uses it by default, you might have
	41	to add -B/bin/ to the PositionIndependentCFlags.***
	42
	43	mit/config/site.def -- Define GccVersion to be 2.
	44
	45	mit/config/sun.cf -- When compiling with GCC 2, use -O2 optimization.
	46
	47	mit/config/sunLib.rules -- When compiling with GCC 2, use -fpic for
	48	position independent code generation.
	49
	50	mit/rgb/Imakefile -- No longer need to compile some modules with
	51	cc on the Sparc since GCC 2 produces proper -fpcc-struct-return code.
	52
	53	mit/server/os/Imakefile -- Likewise.
	54
	55	mit/server/ddx/sun/Imakefile -- When compiling with GCC 2, some modules
	56	should be compiled with -fvolatile.
	57
	58	mit/clients/twm/Imakefile -- Fix bad decls of malloc, realloc in gram.c.
	59
	60	mit/lib/X/Imakefile -- Make libgcc.a a required lib for libX11.so
	61
	62	*** mit/clients/twm/Imakefile Mon May 17 22:05:22 1993
	63	--- new/clients/twm/Imakefile Mon May 17 22:28:46 1993
	64	***************
	65	* 32,41 **
	66	--- 32,48 ----
	67	ComplexProgramTarget(twm)
	68	InstallNonExecFile(system.twmrc,$(TWMDIR))
	69
	70	+ #if HasGcc && GccVersion > 1 && defined (SunArchitecture)
	71	gram.h gram.c: gram.y
	72	yacc $(YFLAGS) gram.y
	73	+ sed -e 's/^extern char \malloc(), \realloc();//g' y.tab.c >gram.c
	74	+ $(MV) y.tab.h gram.h
	75	+ #else
	76	+ gram.h gram.c: gram.y
	77	+ yacc $(YFLAGS) gram.y
	78	$(MV) y.tab.c gram.c
	79	$(MV) y.tab.h gram.h
	80	+ #endif
	81
	82	clean::
	83	$(RM) y.tab.h y.tab.c lex.yy.c gram.h gram.c lex.c deftwmrc.c
	84	*** mit/config/Imake.tmpl Mon May 17 22:02:57 1993
	85	--- new/config/Imake.tmpl Mon May 17 22:15:06 1993
	86	***************
	87	* 500,506 **
88	--- 500,510 ----
89	#endif
90	#ifndef CcCmd
91	#if HasGcc
92	+ #if GccVersion > 1
93	+ #define CcCmd gcc -fpcc-struct-return
94	+ #else
95	#define CcCmd gcc -fstrength-reduce -fpcc-struct-return
96	+ #endif
97	#else
98	#define CcCmd cc
99	#endif
100	*** mit/config/site.def Mon May 17 22:02:44 1993
101	--- new/config/site.def Mon May 17 22:22:28 1993
102	***************
103	* 25,31 **
104
105	#ifdef BeforeVendorCF
106
107	! /* #define HasGcc YES */
108
109	#endif /* BeforeVendorCF */
110
111	--- 25,33 ----
112
113	#ifdef BeforeVendorCF
114
115	! #define HasGcc YES
116	! /* GccVersion > 1 implies building shared libraries with gcc */
117	! #define GccVersion 2
118
119	#endif /* BeforeVendorCF */
120
121	*** mit/config/sun.cf Mon May 17 22:03:02 1993
122	--- new/config/sun.cf Mon May 17 22:24:55 1993
123	***************
124	* 41,49 **
125	--- 41,55 ----
126
127	#if HasGcc
128
129	+ #if GccVersion > 1
130	+ #define OptimizedCDebugFlags -O2
131	+ #else
132	+ #define OptimizedCDebugFlags -O
133	#define SharedLibraryCcCmd cc
134	#define ExtraLoadFlags -B/usr/bin/
135	#define AllocateLocalDefines /**/
136	+ #endif
137	+
138
139	.c.o:
140	$(CC) -c $(CFLAGS) $*.c
141	*** mit/config/sunLib.rules Mon May 17 22:02:46 1993
142	--- new/config/sunLib.rules Mon May 17 22:19:06 1993
143	***************
144	* 23,29 **
145	--- 23,33 ----
146	#define SharedLibraryLoadFlags -assert pure-text
147	#endif
148	#ifndef PositionIndependentCFlags
149	+ #if defined(HasGcc) && GccVersion > 1
150	+ #define PositionIndependentCFlags -fpic
151	+ #else
152	#define PositionIndependentCFlags -pic
153	+ #endif
154	#endif
155
156	/*
157	*** mit/lib/X/Imakefile Mon May 17 22:05:03 1993
158	--- new/lib/X/Imakefile Mon May 17 22:32:26 1993
159	***************
160	* 9,14 **
161	--- 9,31 ----
162	#define MotifBC NO
163	#endif
164
165	+ #if defined(SunArchitecture)
166	+ #if SystemV4
167	+ #if HasGcc
168	+ REQUIREDLIBS= -lgcc -lc
169	+ #else
170	+ REQUIREDLIBS= -lc
171	+ #endif
172	+ #else
173	+ #if HasGcc && GccVersion > 1
174	+ XCOMM Hack to fix gcc 2 ``-nostdlib'' deficiency on SunOS 4.x
175	+ REQUIREDLIBS= `gcc -v 2>&1 \| awk '{print $$4}' \| sed -e 's/specs$$/libgcc.a/'`
176	+ #else
177	+ REQUIREDLIBS=
178	+ #endif
179	+ #endif
180	+ #endif
181	+
182	#ifndef BuildXimp
183	#define BuildXimp NO
184	#endif
185	*** mit/rgb/Imakefile Mon May 17 22:05:31 1993
186	--- new/rgb/Imakefile Mon May 17 22:25:30 1993
187	***************
188	* 17,23 **
189	#if !(defined(SGIArchitecture) \|\| SystemV4)
190	DBMLIB = -ldbm
191	#endif
192	! #if defined(SparcArchitecture) && HasGcc
193	CC = cc
194	CCOPTIONS = /**/
195	EXTRA_LOAD_FLAGS = /**/
196	--- 17,23 ----
197	#if !(defined(SGIArchitecture) \|\| SystemV4)
198	DBMLIB = -ldbm
199	#endif
200	! #if defined(SparcArchitecture) && HasGcc && GccVersion <= 1
201	CC = cc
202	CCOPTIONS = /**/
203	EXTRA_LOAD_FLAGS = /**/
204	*** mit/server/ddx/sun/Imakefile Mon May 17 22:05:57 1993
205	--- new/server/ddx/sun/Imakefile Mon May 17 22:27:23 1993
206	***************
207	* 43,48 **
208	--- 43,53 ----
209	LinkFile(sunGX.o,sunGX.o.dist)
210	#endif
211
212	+ #if HasGcc && GccVersion > 1
213	+ SpecialObjectRule(sunCG2C.o,sunCG2C.c,-fvolatile)
214	+ SpecialObjectRule(sunCG2M.o,sunCG2M.c,-fvolatile)
215	+ #endif
216	+
217	sunInitExtMono.o: $(ICONFIGFILES)
218	ObjectFromSpecialSource(sunInitExtMono,../mi/miinitext,-UPEXEXT)
219	ObjectFromSpecialSource(sunInitMono,sunInit,-DMONO_ONLY)
220	*** mit/server/os/Imakefile Mon May 17 22:05:46 1993
221	--- new/server/os/Imakefile Mon May 17 22:26:02 1993
222	***************
223	* 132,138 **
224	SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES))
225	SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES))
226	SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES))
227	! #if defined(SparcArchitecture) && HasGcc
228	oscolor.o: $(ICONFIGFILES)
229	$(RM) $@
230	cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c
231	--- 132,138 ----
232	SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES))
233	SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES))
234	SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES))
235	! #if defined(SparcArchitecture) && HasGcc && GccVersion <= 1
236	oscolor.o: $(ICONFIGFILES)
237	$(RM) $@
238	cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c
239
240	\f
241	[This is the older version]
242
243	How to compile X11R5 (patch level 11) with GCC version 2:
244
245	The patches include support for building the shared libraries with GCC 2 on
246	the Sparc and 68k machines.
247
248	NOTE: Such shared libraries built with GCC version 2.3 DID NOT WORK
249	with executables previously linked using Sun CC! This is because
250	neither those executables nor the gcc-compiled shared libraries contain
251	libgcc.a. The shared libraries did work with executables linked using
252	GCC (running the Sun linker, of course) because GCC tells the linker to
253	link in libgcc.a. Because of these limitations the default behavior is
254	to NOT build the shared libraries with gcc.
255
256	Changes in GCC 2.4 seem to have eliminated the problem, and such a
257	shared library now seems work with all executables. If you want the
258	gcc-compiled shared libraries turn on "Gcc2BuildLibs" in site.def. If
259	you try this, please tell bug-gcc@prep.ai.mit.edu whether it works.
260
261	Sun forgot to include a static version of libdl.a with some versions
262	of SunOS (4.1 mainly). If you see undefined symbols _dlopen, _dlsym,
263	or _dlclose when linking with -lX11, compile and link against the file
264	mit/util/misc/dlsym.c in the MIT X11R5 distribution.
265
266	mit/config/Imake.tmpl -- Do not set -fstrength-reduce if we have GCC 2. If
267	-fstrength-reduce (or any other -f option) is a major win, then it will
268	most likely be turned on by -O2 optimization.
269
270	mit/config/sunLib.rules -- If HasGcc2 and Gcc2BuildLibs are defined, then
271	use gcc -fpic to generate PIC code. Make sure that gcc does not use gas (the
272	GNU assembler) when compiling PIC code; gas does not assemble it correctly.
273	If you have gas installed where gcc uses it by default, you might have to add
274	-B/bin/ to the PositionIndependentCFlags.
275
276	mit/config/site.def -- Define HasGcc2 to be YES.
277
278	mit/config/sun.cf -- When compiling with GCC 2, use -O2 optimization.
279
280	mit/rgb/Imakefile -- No longer need to compile some modules with
281	cc on the Sparc since GCC 2 produces proper -fpcc-struct-return code.
282
283	mit/server/os/Imakefile -- Likewise.
284
285	mit/clients/twm/Imakefile -- fix bad decls of malloc, realloc in gram.c.
286
287	*** mit/config/Imake.tmpl.ORIG Tue Dec 31 11:07:56 1991
288	--- mit/config/Imake.tmpl Tue Dec 31 12:30:47 1991
289	***************
290	* 499,508 **
291	--- 499,512 ----
292	#define HasGcc NO
293	#endif
294	#ifndef CcCmd
295	+ #if HasGcc2
296	+ #define CcCmd gcc -fpcc-struct-return
297	+ #else
298	#if HasGcc
299	#define CcCmd gcc -fstrength-reduce -fpcc-struct-return
300	#else
301	#define CcCmd cc
302	+ #endif
303	#endif
304	#endif
305	#if HasFortran
306	*** mit/config/sunLib.rules.ORIG Tue Dec 31 11:11:24 1991
307	--- mit/config/sunLib.rules Tue May 5 12:26:12 1992
308	***************
309	* 23,30 **
310	--- 23,34 ----
311	#define SharedLibraryLoadFlags -assert pure-text
312	#endif
313	#ifndef PositionIndependentCFlags
314	+ #if defined(HasGcc2) && defined (Gcc2BuildLibs)
315	+ #define PositionIndependentCFlags -fpic
316	+ #else
317	#define PositionIndependentCFlags -pic
318	#endif
319	+ #endif
320
321	/*
322	* InstallSharedLibrary - generate rules to install the shared library.
323	*** mit/config/site.def.ORIG Tue Dec 31 11:13:49 1991
324	--- mit/config/site.def Tue Dec 31 12:02:59 1991
325	***************
326	* 25,31 **
327
328	#ifdef BeforeVendorCF
329
330	! /* #define HasGcc YES */
331
332	#endif /* BeforeVendorCF */
333
334	--- 25,33 ----
335
336	#ifdef BeforeVendorCF
337
338	! #define HasGcc YES
339	! #define HasGcc2 YES
340	! /* #define Gcc2BuildLibs YES */
341
342	#endif /* BeforeVendorCF */
343
344	*** mit/config/sun.cf.ORIG Tue Dec 31 11:13:57 1991
345	--- mit/config/sun.cf Tue May 5 12:29:50 1992
346	***************
347	* 34,42 **
348	--- 41,61 ----
349
350	#if HasGcc
351
352	+ #if defined(HasGcc2)
353	+ #define OptimizedCDebugFlags -O2
354	+ /* Leave Alone XXX */
355	+ #else
356	+ #define OptimizedCDebugFlags -O
357	#define SharedLibraryCcCmd cc
358	#define ExtraLoadFlags -B/usr/bin/
359	#define AllocateLocalDefines /**/
360	+ #endif
361	+
362	+ #if !defined(Gcc2BuildLibs)
363	+ #define SharedLibraryCcCmd cc
364	+ #define ExtraLoadFlags -B/usr/bin/
365	+ #define AllocateLocalDefines /**/
366	+ #endif
367
368	.c.o:
369	$(CC) -c $(CFLAGS) $*.c
370	*** mit/rgb/Imakefile.ORIG Wed Jan 15 16:43:18 1992
371	--- mit/rgb/Imakefile Thu Jan 2 13:34:09 1992
372	***************
373	* 17,23 **
374	#if !(defined(SGIArchitecture) \|\| SystemV4)
375	DBMLIB = -ldbm
376	#endif
377	! #if defined(SparcArchitecture) && HasGcc
378	CC = cc
379	CCOPTIONS = /**/
380	EXTRA_LOAD_FLAGS = /**/
381	--- 17,23 ----
382	#if !(defined(SGIArchitecture) \|\| SystemV4)
383	DBMLIB = -ldbm
384	#endif
385	! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2)
386	CC = cc
387	CCOPTIONS = /**/
388	EXTRA_LOAD_FLAGS = /**/
389	*** mit/server/os/Imakefile.ORIG Wed Jan 15 16:46:23 1992
390	--- mit/server/os/Imakefile Wed Jan 15 16:46:48 1992
391	***************
392	* 132,138 **
393	SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES))
394	SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES))
395	SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES))
396	! #if defined(SparcArchitecture) && HasGcc
397	oscolor.o: $(ICONFIGFILES)
398	$(RM) $@
399	cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c
400	--- 132,138 ----
401	SpecialObjectRule(osinit.o,$(ICONFIGFILES),$(ADM_DEFINES))
402	SpecialObjectRule(WaitFor.o,$(ICONFIGFILES),$(EXT_DEFINES))
403	SpecialObjectRule(fonttype.o,$(ICONFIGFILES),$(FONT_DEFINES))
404	! #if defined(SparcArchitecture) && HasGcc && !defined(HasGcc2)
405	oscolor.o: $(ICONFIGFILES)
406	$(RM) $@
407	cc -c $(DBM_DEFINES) $(CDEBUGFLAGS) $(ALLDEFINES) $*.c
408	*** 1.1 1992/09/08 19:52:07
409	--- mit/server/ddx/sun/Imakefile 1992/09/08 21:10:22
410	***************
411	* 43,48 **
412	--- 43,53 ----
413	LinkFile(sunGX.o,sunGX.o.dist)
414	#endif
415
416	+ #if HasGcc2
417	+ SpecialObjectRule(sunCG2C.o,sunCG2C.c,-fvolatile)
418	+ SpecialObjectRule(sunCG2M.o,sunCG2M.c,-fvolatile)
419	+ #endif
420	+
421	sunInitExtMono.o: $(ICONFIGFILES)
422	ObjectFromSpecialSource(sunInitExtMono,../mi/miinitext,-UPEXEXT)
423	ObjectFromSpecialSource(sunInitMono,sunInit,-DMONO_ONLY)
424
425	*** /tmp/RCSAa24446 Tue Sep 15 12:23:32 1992
426	--- mit/clients/twm/Imakefile Thu Aug 13 18:18:07 1992
427	***************
428	* 32,41 **
429	--- 32,48 ----
430	ComplexProgramTarget(twm)
431	InstallNonExecFile(system.twmrc,$(TWMDIR))
432
433	+ #if HasGcc2 && defined (SunArchitecture)
434	gram.h gram.c: gram.y
435	yacc $(YFLAGS) gram.y
436	+ sed -e 's/^extern char \malloc(), \realloc();//g' y.tab.c >gram.c
437	+ $(MV) y.tab.h gram.h
438	+ #else
439	+ gram.h gram.c: gram.y
440	+ yacc $(YFLAGS) gram.y
441	$(MV) y.tab.c gram.c
442	$(MV) y.tab.h gram.h
443	+ #endif
444
445	clean::
446	$(RM) y.tab.h y.tab.c lex.yy.c gram.h gram.c lex.c deftwmrc.c
447