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common/filestuff.c: No sockets on DJGPP.

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Building gdb with --host=i586-pc-msdosdjgpp ends up with:

 i586-pc-msdosdjgpp-gcc -g -O2 -I../../src/gdb/config/djgpp  -I. -I../../src/gdb -I../../src/gdb/common -I../../src/gdb/config -DLOCALEDIR="\"/usr/local/share/locale\"" -DHAVE_CONFIG_H -I../../src/gdb/../include/opcode -I../../src/gdb/../opcodes/.. -I../../src/gdb/../readline/.. -I../bfd -I../../src/gdb/../bfd -I../../src/gdb/../include -I../libdecnumber -I../../src/gdb/../libdecnumber -I./../intl -I../../src/gdb/gnulib/import -Ibuild-gnulib/import    -Wall -Wdeclaration-after-statement -Wpointer-arith -Wformat-nonliteral -Wpointer-sign -Wno-unused -Wunused-value -Wunused-function -Wno-switch -Wno-char-subscripts -Wmissing-prototypes -Wdeclaration-after-statement -Wempty-body -Werror -c -o filestuff.o -MT filestuff.o -MMD -MP -MF .deps/filestuff.Tpo ../../src/gdb/common/filestuff.c
 ../../src/gdb/common/filestuff.c:38:24: fatal error: sys/socket.h: No such file or directory

There are no sockets on djgpp.  This #ifdef's out the bits in the file
that use sockets, depending on whether winsock or sys/socket.h is
available.

As alternative approach, given ser-tcp.c, ser-pipe.c, etc. are split
into separate files, and which to use is selected by configure.ac:

 dnl Figure out which of the many generic ser-*.c files the _host_ supports.
 SER_HARDWIRE="ser-base.o ser-unix.o ser-pipe.o ser-tcp.o"
 case ${host} in
  *go32* ) SER_HARDWIRE=ser-go32.o ;;
  *djgpp* ) SER_HARDWIRE=ser-go32.o ;;
  *mingw32*) SER_HARDWIRE="ser-base.o ser-tcp.o ser-mingw.o" ;;
 esac
 AC_SUBST(SER_HARDWIRE)

... I considered splitting filestuff.c similarly.  But I quickly gave
up on the idea, as it looked like a lot more complication over this
approach, for no real gain.  Plus, there are uses of these functions
outside the ser*.c framework.

gdbserver's configure.ac is already checking for sys/socket.h.

gdb/
2013-05-23  Pedro Alves  <palves@redhat.com>

	* common/filestuff.c [USE_WIN32API]: Define HAVE_SOCKETS.
	[HAVE_SYS_SOCKET_H]: Define HAVE_SOCKETS.
	(socket_mark_cloexec, gdb_socketpair_cloexec, gdb_socket_cloexec):
	Only define if HAVE_SOCKETS is defined.
	* configure.ac: Check for sys/socket.h.
	* config.in, configure: Regenerate.
This commit is contained in:
Pedro Alves 2013-05-23 18:37:00 +00:00
parent 21aa081e21
commit 8658d16d9d
5 changed files with 23 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
gdb/ChangeLog
View File

@ -1,3 +1,12 @@
2013-05-23 Pedro Alves <palves@redhat.com>
* common/filestuff.c [USE_WIN32API]: Define HAVE_SOCKETS.
[HAVE_SYS_SOCKET_H]: Define HAVE_SOCKETS.
(socket_mark_cloexec, gdb_socketpair_cloexec, gdb_socket_cloexec):
Only define if HAVE_SOCKETS is defined.
* configure.ac: Check for sys/socket.h.
* config.in, configure: Regenerate.
2013-05-23 Pedro Alves <palves@redhat.com>
* dwarf2read.c (create_dwp_hash_table, create_dwo_in_dwp)

10
gdb/common/filestuff.c
View File

@ -34,10 +34,12 @@
#ifdef USE_WIN32API
#include <winsock2.h>
#include <windows.h>
#else
#define HAVE_SOCKETS 1
#elif defined HAVE_SYS_SOCKET_H
#include <sys/socket.h>
/* Define HAVE_F_GETFD if we plan to use F_GETFD. */
#define HAVE_F_GETFD F_GETFD
#define HAVE_SOCKETS 1
#endif
#ifdef HAVE_SYS_RESOURCE_H
@ -277,6 +279,8 @@ maybe_mark_cloexec (int fd)
mark_cloexec (fd);
}
#ifdef HAVE_SOCKETS
/* Like maybe_mark_cloexec, but for callers that use SOCK_CLOEXEC. */
static void
@ -286,6 +290,8 @@ socket_mark_cloexec (int fd)
mark_cloexec (fd);
}
#endif
/* See filestuff.h. */
@ -335,6 +341,7 @@ gdb_fopen_cloexec (const char *filename, const char *opentype)
return result;
}
#ifdef HAVE_SOCKETS
/* See filestuff.h. */
int
@ -367,6 +374,7 @@ gdb_socket_cloexec (int namespace, int style, int protocol)
return result;
}
#endif
/* See filestuff.h. */

3
gdb/config.in
View File

@ -509,6 +509,9 @@
/* Define to 1 if you have the <sys/select.h> header file. */
#undef HAVE_SYS_SELECT_H
/* Define to 1 if you have the <sys/socket.h> header file. */
#undef HAVE_SYS_SOCKET_H
/* Define to 1 if you have the <sys/stat.h> header file. */
#undef HAVE_SYS_STAT_H

2
gdb/configure vendored
View File

@ -8911,7 +8911,7 @@ $as_echo "#define STDC_HEADERS 1" >>confdefs.h
fi
# elf_hp.h is for HP/UX 64-bit shared library support.
for ac_header in nlist.h machine/reg.h poll.h sys/poll.h proc_service.h \
for ac_header in nlist.h machine/reg.h poll.h sys/poll.h sys/socket.h proc_service.h \
thread_db.h signal.h stddef.h \
stdlib.h string.h memory.h strings.h sys/fault.h \
sys/file.h sys/filio.h sys/ioctl.h sys/param.h \

2
gdb/configure.ac
View File

@ -1089,7 +1089,7 @@ fi
AC_HEADER_DIRENT
AC_HEADER_STDC
# elf_hp.h is for HP/UX 64-bit shared library support.
AC_CHECK_HEADERS([nlist.h machine/reg.h poll.h sys/poll.h proc_service.h \
AC_CHECK_HEADERS([nlist.h machine/reg.h poll.h sys/poll.h sys/socket.h proc_service.h \
thread_db.h signal.h stddef.h \
stdlib.h string.h memory.h strings.h sys/fault.h \
sys/file.h sys/filio.h sys/ioctl.h sys/param.h \