Remove support for Solaris < 10 (PR gdb/22185)

Given that GCC has obsoleted/removed support for Solaris 9 in GCC 4.9/5 in 2013:

    https://gcc.gnu.org/gcc-4.9/changes.html
    https://gcc.gnu.org/ml/gcc-patches/2013-05/msg00728.html

and the last gdb version that can be compiled with gcc 4.9 is 7.12.1 only when
configured with --disable-build-with-cxx, it's time to obsolete/remove support
for Solaris < 10.

This patch does this, simplifying configure.nat along the way (only a single
sol2 configuration with variants for i386 and sparc).

Some configure checks for older Solaris versions can go, too, and the check
for libthread_db.so.1 removed:

* Since Solaris 10, dlopen has moved to libc and libdl.so is just a
  filter on ld.so.1, so no need to check.

* $RDYNAMIC is already handled above (and is a no-op with Solaris ld
  anyway).

Both proc-service.c and sol-thread.c lose support for (Solaris-only)
PROC_SERVICE_IS_OLD.

The attached revised patch has been tested on sparcv9-sun-solaris2.10,
sparcv9-sun-solaris2.11.4, amd64-pc-solaris2.10, amd64-pc-solaris2.11.4,
and x86_64-pc-linux-gnu.

I've also started an i386-pc-solaris2.9 build to check that it really
stops as expected.

	PR gdb/22185
	* configure.host <*-*-solaris2.[01], *-*-solaris2.[2-9]*>: Mark as
	obsolete.
	Use gdb_host sol2 for i[34567]86-*-solaris2*, x86_64-*-solaris2*.
	Remove i386sol2 support.
	* configure.nat <i386sol2>: Remove.
	<sol2-64>: Fold into ...
	<sol2>: ... this.
	Move common settings to default section.
	Add sol-thread.o.
	* configure.tgt <i[34567]86-*-solaris2.1[0-9]*,
	x86_64-*-solaris2.1[0-9]*>: Rename to ...
	<i[34567]86-*-solaris2*, x86_64-*-solaris2*>: ... this.
	<i[34567]86-*-solaris*>: Remove.
	<sparc-*-solaris2.[0-6], sparc-*-solaris2.[0-6].*>: Remove.

	* configure.ac: Remove wctype in libw check.
	(_MSE_INT_H): Don't define on Solaris 7-9.
	<solaris*>: Remove libthread_db.so.1 check.
	* configure: Regenerate.
	* config.in: Regenerate.

	* proc-service.c: Remove PROC_SERVICE_IS_OLD handling.
	(gdb_ps_prochandle_t, gdb_ps_read_buf_t, gdb_ps_write_buf_t)
	(gdb_ps_size_t): Remove.
	Use base types in users.
	* sol-thread.c: Likewise, also for gdb_ps_addr_t.

	* NEWS (Changes since GDB 8.0): Document Solaris 2.0-9 removal.

1 files changed, 9 insertions, 29 deletions

diff --git a/gdb/proc-service.c b/gdb/proc-service.c
index 4620fea..4f53c9b 100644
--- a/gdb/proc-service.c
+++ b/gdb/proc-service.c
@@ -34,24 +34,6 @@
 #include "gregset.h"
 
 
-/* Fix-up some broken systems.  */
-
-/* The prototypes in <proc_service.h> are slightly different on older
-   systems.  Compensate for the discrepancies.  */
-
-#ifdef PROC_SERVICE_IS_OLD
-typedef const struct ps_prochandle *gdb_ps_prochandle_t;
-typedef char *gdb_ps_read_buf_t;
-typedef char *gdb_ps_write_buf_t;
-typedef int gdb_ps_size_t;
-#else
-typedef struct ps_prochandle *gdb_ps_prochandle_t;
-typedef void *gdb_ps_read_buf_t;
-typedef const void *gdb_ps_write_buf_t;
-typedef size_t gdb_ps_size_t;
-#endif
-
-
 /* Helper functions.  */
 
 /* Convert a psaddr_t to a CORE_ADDR.  */
@@ -107,7 +89,7 @@ ps_xfer_memory (const struct ps_prochandle *ph, psaddr_t addr,
    symbol is stored in SYM_ADDR.  */
 
 ps_err_e
-ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
+ps_pglobal_lookup (struct ps_prochandle *ph, const char *obj,
 		   const char *name, psaddr_t *sym_addr)
 {
   struct inferior *inf = find_inferior_ptid (ph->ptid);
@@ -129,8 +111,7 @@ ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
    them into BUF.  */
 
 ps_err_e
-ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
-	   gdb_ps_read_buf_t buf, gdb_ps_size_t size)
+ps_pdread (struct ps_prochandle *ph, psaddr_t addr, void *buf, size_t size)
 {
   return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 0);
 }
@@ -138,8 +119,8 @@ ps_pdread (gdb_ps_prochandle_t ph, psaddr_t addr,
 /* Write SIZE bytes from BUF into the target process PH at address ADDR.  */
 
 ps_err_e
-ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
-	    gdb_ps_write_buf_t buf, gdb_ps_size_t size)
+ps_pdwrite (struct ps_prochandle *ph, psaddr_t addr,
+	    const void *buf, size_t size)
 {
   return ps_xfer_memory (ph, addr, (gdb_byte *) buf, size, 1);
 }
@@ -148,7 +129,7 @@ ps_pdwrite (gdb_ps_prochandle_t ph, psaddr_t addr,
    and store them in GREGSET.  */
 
 ps_err_e
-ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
+ps_lgetregs (struct ps_prochandle *ph, lwpid_t lwpid, prgregset_t gregset)
 {
   ptid_t ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
   struct regcache *regcache
@@ -164,7 +145,7 @@ ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
    from GREGSET.  */
 
 ps_err_e
-ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
+ps_lsetregs (struct ps_prochandle *ph, lwpid_t lwpid, const prgregset_t gregset)
 {
   ptid_t ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
   struct regcache *regcache
@@ -180,8 +161,7 @@ ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
    process PH and store them in FPREGSET.  */
 
 ps_err_e
-ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
-	       gdb_prfpregset_t *fpregset)
+ps_lgetfpregs (struct ps_prochandle *ph, lwpid_t lwpid, gdb_prfpregset_t *fpregset)
 {
   ptid_t ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
   struct regcache *regcache
@@ -197,7 +177,7 @@ ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
    process PH from FPREGSET.  */
 
 ps_err_e
-ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
+ps_lsetfpregs (struct ps_prochandle *ph, lwpid_t lwpid,
 	       const gdb_prfpregset_t *fpregset)
 {
   ptid_t ptid = ptid_build (ptid_get_pid (ph->ptid), lwpid, 0);
@@ -214,7 +194,7 @@ ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
    -- not used on Solaris.  */
 
 pid_t
-ps_getpid (gdb_ps_prochandle_t ph)
+ps_getpid (struct ps_prochandle *ph)
 {
   return ptid_get_pid (ph->ptid);
 }