configure.ac: drop unneeded dependency check

The script configure.ac checks for the presence of system include
files required to build OpenOCD.

It incorrectly check for:
	dirent.h
	pthread.h
	ifaddrs.h
	net/if.h
that are never included by OpenOCD source code, plus the generated
macros:
	HAVE_DIRENT_H
	HAVE_PTHREAD_H
	HAVE_IFADDRS_H
	HAVE_NET_IF_H
are never used in OpenOCD source code.

It also checks for the system function:
	vasprintf()
that is never called by OpenOCD source code, plus the generated
macro:
	HAVE_VASPRINTF
is never used in OpenOCD source code.

Drop the checks for the unused system include files and the unused
system function.

Change-Id: I68c1b1a1be268a830247fc489f210877c32d7d23
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7175
Tested-by: jenkins

diff --git a/configure.ac b/configure.ac
index 7d0cc24698a71827c75b98d41098f6148bebef0d..8e1f11e2d7ad062ba31333a9ba95ab4d5a61ed7e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -55,12 +55,10 @@ AC_CHECK_HEADERS([elf.h])
 AC_EGREP_HEADER(Elf64_Ehdr, [elf.h], [
   AC_DEFINE([HAVE_ELF64], [1], [Define to 1 if the system has the type `Elf64_Ehdr'.])
 ])
-AC_CHECK_HEADERS([dirent.h])
 AC_CHECK_HEADERS([fcntl.h])
 AC_CHECK_HEADERS([malloc.h])
 AC_CHECK_HEADERS([netdb.h])
 AC_CHECK_HEADERS([poll.h])
-AC_CHECK_HEADERS([pthread.h])
 AC_CHECK_HEADERS([strings.h])
 AC_CHECK_HEADERS([sys/ioctl.h])
 AC_CHECK_HEADERS([sys/param.h])
@@ -70,7 +68,7 @@ AC_CHECK_HEADERS([sys/sysctl.h])
 AC_CHECK_HEADERS([sys/time.h])
 AC_CHECK_HEADERS([sys/types.h])
 AC_CHECK_HEADERS([unistd.h])
-AC_CHECK_HEADERS([arpa/inet.h ifaddrs.h netinet/in.h netinet/tcp.h net/if.h], [], [], [dnl
+AC_CHECK_HEADERS([arpa/inet.h netinet/in.h netinet/tcp.h], [], [], [dnl
 #include <stdio.h>
 #ifdef STDC_HEADERS
 # include <stdlib.h>
@@ -94,7 +92,6 @@ AC_CHECK_FUNCS([strndup])
 AC_CHECK_FUNCS([strnlen])
 AC_CHECK_FUNCS([gettimeofday])
 AC_CHECK_FUNCS([usleep])
-AC_CHECK_FUNCS([vasprintf])
 AC_CHECK_FUNCS([realpath])
 
 # guess-rev.sh only exists in the repository, not in the released archives