Use $CRT_DIR in more places.

* configure.in (--with-crt-dir): Doc fix (now valid for all platforms).
(CRT_DIR): On (powerpc64|sparc64)-*-linux-gnu*, default to /usr/lib64.
On hpux10-20, default to /lib.

* src/m/amdx86-64.h (START_FILES, LIB_STANDARD): Change the logic around,
since the defaults (set by the system file) are fine in most cases.
[GNU_LINUX, __OpenBSD__, __NetBSD__, __APPLE__]: Remove sections.
* src/m/ibms390x.h (START_FILES, LIB_STANDARD):
* src/m/macppc.h (START_FILES, LIB_STANDARD) [GNU_LINUX]:
* src/m/sparc.h (START_FILES, LIB_STANDARD) [__linux__]:
Remove definitions, since they are set correctly in s/gnu-linux.h.
* src/s/freebsd.h (START_FILES, LIB_STANDARD):
* src/s/gnu-linux.h (START_FILES, LIB_STANDARD):
* src/s/hpux10-20.h (START_FILES):
* src/s/netbsd.h (START_FILES, LIB_STANDARD, START_FILES_1, END_FILES_1):
Use $CRT_DIR in place of fixed /usr/lib, /lib directories.

* src/Makefile.in: Comment.

4 files changed, 7 insertions, 46 deletions

diff --git a/src/m/amdx86-64.h b/src/m/amdx86-64.h
index 6d27c950ce4..f7dfb126e6e 100644
--- a/src/m/amdx86-64.h
+++ b/src/m/amdx86-64.h
@@ -67,34 +67,18 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 /* Define XPNTR to avoid or'ing with DATA_SEG_BITS */
 #undef DATA_SEG_BITS
 
-#ifdef __OpenBSD__
 
+/* For GNU_LINUX,  __OpenBSD__, __NetBSD__, __APPLE__, things are set
+   correctly in s/gnu-linux.h, netbsd.h, darwin.h.  */
+#ifdef SOLARIS2
 #undef START_FILES
-#define START_FILES pre-crt0.o /usr/lib/crt0.o /usr/lib/crtbegin.o
 #undef LIB_STANDARD
-#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib/crtend.o
-
-#elif defined(__NetBSD__)
-
-/* LIB_STANDARD and START_FILES set correctly in s/netbsd.h */
-
-#elif defined(SOLARIS2)
-
-#undef START_FILES
-#undef LIB_STANDARD
-
-#elif defined(__APPLE__)
-
-/* LIB_STANDARD and START_FILES set correctly in s/darwin.h */
-
-#else /* !__OpenBSD__ && !__NetBSD__ && !SOLARIS2 && !__APPLE__ */
-/* CRT_DIR defaults to /usr/lib.  On GNU/Linux, it may be /usr/lib64.
-   On FreeBSD, the libraries for binaries native to the build host's
+#elif defined (__FreeBSD__) || (defined (DARWIN_OS) && !defined (__APPLE__))
+/* On FreeBSD, the libraries for binaries native to the build host's
    architecture are installed under /usr/lib, and the ones that need
    special paths are 32-bit compatibility libraries (installed under
    /usr/lib32).  So to build a native binary of Emacs on FreeBSD/amd64
-   we can just point to /usr/lib.
- */
+   we can just point to /usr/lib (the default $CRT_DIR).  */
 #undef START_FILES
 #define START_FILES pre-crt0.o $(CRT_DIR)/crt1.o $(CRT_DIR)/crti.o
 /* The duplicate -lgcc is intentional in the definition of LIB_STANDARD.
@@ -105,7 +89,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #undef LIB_STANDARD
 #define LIB_STANDARD -lgcc -lc -lgcc $(CRT_DIR)/crtn.o
 
-#endif /* __OpenBSD__ */
+#endif /* SOLARIS2 */
 #endif /* !i386 */
 
 /* arch-tag: 8a5e001d-e12e-4692-a3a6-0b15ba271c6e
diff --git a/src/m/ibms390x.h b/src/m/ibms390x.h
index 3026266b349..18cd87f0b9a 100644
--- a/src/m/ibms390x.h
+++ b/src/m/ibms390x.h
@@ -85,11 +85,5 @@ NOTE-END */
 
 #define XPNTR(a) XUINT (a)
 
-#undef START_FILES
-#define START_FILES pre-crt0.o $(CRT_DIR)/crt1.o $(CRT_DIR)/crti.o
-
-#undef LIB_STANDARD
-#define LIB_STANDARD -lgcc -lc -lgcc $(CRT_DIR)/crtn.o
-
 /* arch-tag: 4b87653c-6add-4663-8691-7d9dc17b5519
    (do not change this comment) */
diff --git a/src/m/macppc.h b/src/m/macppc.h
index 112c15ed8e4..d58592d915a 100644
--- a/src/m/macppc.h
+++ b/src/m/macppc.h
@@ -39,12 +39,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifdef GNU_LINUX
 #define LINKER $(CC) -nostdlib
-#ifdef _ARCH_PPC64
-#undef START_FILES
-#define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
-#undef LIB_STANDARD
-#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
-#endif
 #endif
 
 #ifdef _ARCH_PPC64
diff --git a/src/m/sparc.h b/src/m/sparc.h
index b43e56bc3b9..22611636115 100644
--- a/src/m/sparc.h
+++ b/src/m/sparc.h
@@ -52,17 +52,6 @@ NOTE-END  */
 
 #ifdef __arch64__		/* GCC, 64-bit ABI.  */
 #define BITS_PER_LONG 64
-#ifdef __linux__
-#undef START_FILES
-#define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
-
-/* The duplicate -lgcc is intentional in the definition of LIB_STANDARD.
-   The reason is that some functions in libgcc.a call functions from libc.a,
-   and some libc.a functions need functions from libgcc.a.  Since most
-   versions of ld are one-pass linkers, we need to mention -lgcc twice,
-   or else we risk getting unresolved externals.  */
-#undef LIB_STANDARD
-#define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
 #endif
 
 #ifndef _LP64