Makefile: allow static linking against libcurl

This requires more flags than can be guessed with the old-style
CURLDIR and related options, so is only supported when curl-config is
present.

Signed-off-by: Dave Borowitz <dborowitz@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index d6330bc6752ab4f5b2655a3bf911bff08998abca..e4c93f68ec87a8907a8e80f1043d675328f712e4 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -37,6 +37,9 @@ all::
 # Define CURL_CONFIG to the path to a curl-config binary other than the
 # default 'curl-config'.
 #
+# Define CURL_STATIC to statically link libcurl.  Only applies if
+# CURL_CONFIG is used.
+#
 # Define CURLDIR=/foo/bar if your curl header and library files are in
 # /foo/bar/include and /foo/bar/lib directories.  This overrides CURL_CONFIG,
 # but is less robust.
@@ -1139,9 +1142,16 @@ else
        else
                CURL_CONFIG ?= curl-config
                BASIC_CFLAGS += $(shell $(CURL_CONFIG) --cflags)
-               CURL_LIBCURL = $(shell $(CURL_CONFIG) --libs)
-               ifeq "$(CURL_LIBCURL)" ""
-                       $(error curl not detected; try setting CURLDIR)
+               ifdef CURL_STATIC
+                       CURL_LIBCURL = $(shell $(CURL_CONFIG) --static-libs)
+                       ifeq "$(CURL_LIBCURL)" ""
+                               $(error libcurl not detected or not compiled with static support)
+                       endif
+               else
+                       CURL_LIBCURL = $(shell $(CURL_CONFIG) --libs)
+                       ifeq "$(CURL_LIBCURL)" ""
+                               $(error libcurl not detected; try setting CURLDIR)
+                       endif
                endif
        endif