cygwin.h (STARTFILE_SPEC): search */lib/w32api by default.

* config/i386/cygwin.h (STARTFILE_SPEC): search */lib/w32api by default.
(CPP_SPEC): Always search */include/w32api for header files.
(ASM_OUTPUT_SECTION_NAME): Avoid testing NULL DECL.
(LINK_SPEC): Add "cyg" to the library search prefixes.

From-SVN: r41196

gcc/ChangeLog

+Sun Apr  8 22:20:27 2001  Christopher Faylor <cgf@cygnus.com>
+
+	* config/i386/cygwin.h (STARTFILE_SPEC): search */lib/w32api by default.
+	(CPP_SPEC): Always search */include/w32api for header files.
+	(ASM_OUTPUT_SECTION_NAME): Avoid testing NULL DECL.
+	(LINK_SPEC): Add "cyg" to the library search prefixes.
+
 2001-04-08  Philip Blundell  <philb@gnu.org>
 
 	* config/arm/arm.h (ASM_OUTPUT_LABELREF): Use asm_fprintf.

gcc/config/i386/cygwin.h

@@ -60,29 +60,13 @@ Boston, MA 02111-1307, USA. */
 { "no-nop-fun-dllimport", -MASK_NOP_FUN_DLLIMPORT, "" }, \
 { "threads",		  0, N_("Use Mingw-specific thread support") },
 
-
-/* Support the __declspec keyword by turning them into attributes.
-   We currently only support: dllimport and dllexport.
-   Note that the current way we do this may result in a collision with
-   predefined attributes later on.  This can be solved by using one attribute,
-   say __declspec__, and passing args to it.  The problem with that approach
-   is that args are not accumulated: each new appearance would clobber any
-   existing args.  */
-
 #undef CPP_PREDEFINES
 #define CPP_PREDEFINES "-D_X86_=1 -Asystem=winnt"
 
-/* Normally, -lgcc is not needed since everything in it is in the DLL, but we
-   want to allow things to be added to it when installing new versions of
-   GCC without making a new CYGWIN.DLL, so we leave it.  Profiling is handled
-   by calling the init function from the prologue. */
-
-#undef LIBGCC_SPEC
-#define LIBGCC_SPEC "%{mno-cygwin: %{mthreads:-lmingwthrd} -lmingw32} -lgcc %{mno-cygwin:-lmoldname -lmsvcrt}"
-
 #ifdef CROSS_COMPILE
 #define CYGWIN_INCLUDES "-idirafter " CYGWIN_CROSS_DIR "/include"
-#define CYGWIN_W32API "-idirafter " CYGWIN_CROSS_DIR "/include/w32api"
+#define W32API_INC "-idirafter " CYGWIN_CROSS_DIR "/include/w32api"
+#define W32API_LIB "-L" CYGWIN_CROSS_DIR "/lib/w32api/"
 #define CYGWIN_LIB CYGWIN_CROSS_DIR "/lib"
 #define MINGW_LIBS "-L" CYGWIN_CROSS_DIR "/lib/mingw"
 #define MINGW_INCLUDES "-isystem " CYGWIN_CROSS_DIR "/include/mingw/g++-3 "\
@@ -90,7 +74,8 @@ Boston, MA 02111-1307, USA. */
 		       "-idirafter " CYGWIN_CROSS_DIR "/include/mingw"
 #else
 #define CYGWIN_INCLUDES "-isystem /usr/local/include -idirafter /usr/include"
-#define CYGWIN_W32API "-idirafter /usr/include/w32api"
+#define W32API_INC "-idirafter /usr/include/w32api"
+#define W32API_LIB "-L/usr/lib/w32api/"
 #define CYGWIN_LIB "/usr/lib"
 #define MINGW_LIBS "-L/usr/local/lib/mingw -L/usr/lib/mingw"
 #define MINGW_INCLUDES "-isystem /usr/include/mingw/g++-3 "\
@@ -99,10 +84,13 @@ Boston, MA 02111-1307, USA. */
 		       "-idirafter /usr/include/mingw"
 #endif
 
-#undef STARTFILE_SPEC
-#define STARTFILE_SPEC "%{shared|mdll: %{mno-cygwin:dllcrt2%O%s}} \
-  %{!shared: %{!mdll: %{!mno-cygwin:crt0%O%s} %{mno-cygwin:" MINGW_LIBS " mingw/crt2%O%s} \
-  %{pg:gcrt0%O%s}}}"
+/* Support the __declspec keyword by turning them into attributes.
+   We currently only support: dllimport and dllexport.
+   Note that the current way we do this may result in a collision with
+   predefined attributes later on.  This can be solved by using one attribute,
+   say __declspec__, and passing args to it.  The problem with that approach
+   is that args are not accumulated: each new appearance would clobber any
+   existing args.  */
 
 #undef CPP_SPEC
 #define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} \
@@ -112,14 +100,30 @@ Boston, MA 02111-1307, USA. */
     -D_cdecl=__attribute__((__cdecl__))} \
   -D__declspec(x)=__attribute__((x)) \
   -D__i386__ -D__i386 \
-  %{mno-win32: %{mno-cygwin: %emno-cygwin and mno-win32 are not compatible}} \
-  %{mno-cygwin:-D__MSVCRT__ -D__MINGW32__ %{mthreads:-D_MT} " MINGW_INCLUDES \
-    " -mwin32} \
-  %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix \
-    " CYGWIN_INCLUDES "} \
-  %{mwin32:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ -DWINNT " CYGWIN_W32API "} \
+  %{mno-win32:%{mno-cygwin: %emno-cygwin and mno-win32 are not compatible}} \
+  %{mno-cygwin:-D__MSVCRT__ -D__MINGW32__ %{mthreads:-D_MT} "\
+    MINGW_INCLUDES "} \
+  %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix__ -D__unix "\
+    CYGWIN_INCLUDES "}\
+  %{mwin32|no-cygwin:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ -DWINNT}\
+  %{!mno-win32:" W32API_INC "}\
+"
+
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC W32API_LIB "\
+  %{shared|mdll: %{mno-cygwin:" MINGW_LIBS " mingw/dllcrt2%O%s}}\
+  %{!shared: %{!mdll: %{!mno-cygwin:crt0%O%s} %{mno-cygwin:" MINGW_LIBS " mingw/crt2%O%s}\
+  %{pg:gcrt0%O%s}}}\
 "
 
+/* Normally, -lgcc is not needed since everything in it is in the DLL, but we
+   want to allow things to be added to it when installing new versions of
+   GCC without making a new CYGWIN.DLL, so we leave it.  Profiling is handled
+   by calling the init function from the prologue. */
+
+#undef LIBGCC_SPEC
+#define LIBGCC_SPEC "%{mno-cygwin: %{mthreads:-lmingwthrd} -lmingw32} -lgcc %{mno-cygwin:-lmoldname -lmsvcrt}"
+
 /* This macro defines names of additional specifications to put in the specs
    that can be used in various specifications like CC1_SPEC.  Its definition
    is an initializer with a subgrouping for each command option.
@@ -154,7 +158,8 @@ Boston, MA 02111-1307, USA. */
   %{static:-Bstatic} %{!static:-Bdynamic} \
   %{shared|mdll: -e \
     %{mno-cygwin:_DllMainCRTStartup@12} \
-    %{!mno-cygwin:__cygwin_dll_entry@12}}"
+    %{!mno-cygwin:__cygwin_dll_entry@12}}\
+  --dll-search-prefix=cyg"
 
 #undef MATH_LIBRARY
 #define MATH_LIBRARY ""
@@ -451,7 +456,7 @@ do {									\
   else									\
     {									\
       type = SECT_RW;							\
-      if (TREE_CODE (DECL) == VAR_DECL					\
+      if (DECL && TREE_CODE (DECL) == VAR_DECL				\
 	  && lookup_attribute ("shared", DECL_MACHINE_ATTRIBUTES (DECL))) \
 	mode = "ws";							\
       else								\
@@ -523,9 +528,6 @@ do {									\
 #undef ASM_COMMENT_START
 #define ASM_COMMENT_START " #"
 
-/* DWARF2 Unwinding doesn't work with exception handling yet. */
-#define DWARF2_UNWIND_INFO 0
-
 /* Don't assume anything about the header files. */
 #define NO_IMPLICIT_EXTERN_C