Makefile: add NEEDS_RESOLV to optionally add -lresolv to compile arguments

This library is required on Solaris when compiling with NO_IPV6 since
hstrerror resides in libresolv.  Additionally, Solaris 7 will need it,
since inet_ntop and inet_pton reside there too.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index ba780775c77d0de628f492a55c561c0504d84e64..d36e92c10d0e8ca9daecde306d5468e59f5eef69 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -91,6 +91,10 @@ all::
 # Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
 # Patrick Mauritz).
 #
+# Define NEEDS_RESOLV if linking with -lnsl and/or -lsocket is not enough.
+# Notably on Solaris hstrerror resides in libresolv and on Solaris 7
+# inet_ntop and inet_pton additionally reside there.
+#
 # Define NO_MMAP if you want to avoid mmap.
 #
 # Define NO_PTHREADS if you do not have or do not want to use Pthreads.
@@ -700,7 +704,6 @@ ifeq ($(uname_S),SunOS)
        SHELL_PATH = /bin/bash
        NO_STRCASESTR = YesPlease
        NO_MEMMEM = YesPlease
-       NO_HSTRERROR = YesPlease
        NO_MKDTEMP = YesPlease
        OLD_ICONV = UnfortunatelyYes
        ifeq ($(uname_R),5.8)
@@ -715,6 +718,9 @@ ifeq ($(uname_S),SunOS)
                NO_C99_FORMAT = YesPlease
                NO_STRTOUMAX = YesPlease
        endif
+       ifdef NO_IPV6
+               NEEDS_RESOLV = YesPlease
+       endif
        INSTALL = /usr/ucb/install
        TAR = gtar
        BASIC_CFLAGS += -D__EXTENSIONS__
@@ -956,6 +962,9 @@ endif
 ifdef NEEDS_NSL
        EXTLIBS += -lnsl
 endif
+ifdef NEEDS_RESOLV
+       EXTLIBS += -lresolv
+endif
 ifdef NO_D_TYPE_IN_DIRENT
        BASIC_CFLAGS += -DNO_D_TYPE_IN_DIRENT
 endif