build: link with curl-defined linker flags

Adjusting the build process to rely more on curl-config to populate
linker flags instead of manually populating flags based off detected
features.

Originally, a configure-invoked build would check for SSL-support in the
target curl library. If enabled, NEEDS_SSL_WITH_CURL would be set and
used in the Makefile to append additional libraries to link against. As
for systems building solely with make, the defines NEEDS_IDN_WITH_CURL
and NEEDS_SSL_WITH_CURL could be set to indirectly enable respective
linker flags. Since both configure.ac and Makefile already rely on
curl-config utility to provide curl-related build information, adjusting
the respective assets to populate required linker flags using the
utility (unless explicitly configured).

Signed-off-by: James Knight <james.d.knight@live.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index bbfbb4292d49e99704d75a093a97d432c537cd8d..ad005af5d4cce3565e91cf510f43d48c6eedaadb 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -59,6 +59,13 @@ all::
 # Define CURL_CONFIG to curl's configuration program that prints information
 # about the library (e.g., its version number).  The default is 'curl-config'.
 #
+# Define CURL_LDFLAGS to specify flags that you need to link when using libcurl,
+# if you do not want to rely on the libraries provided by CURL_CONFIG.  The
+# default value is a result of `curl-config --libs`.  An example value for
+# CURL_LDFLAGS is as follows:
+#
+#     CURL_LDFLAGS=-lcurl
+#
 # Define NO_EXPAT if you do not have expat installed.  git-http-push is
 # not built, and you cannot push using http:// and https:// transports (dumb).
 #
@@ -183,10 +190,6 @@ all::
 #
 # Define NEEDS_SSL_WITH_CRYPTO if you need -lssl when using -lcrypto (Darwin).
 #
-# Define NEEDS_SSL_WITH_CURL if you need -lssl with -lcurl (Minix).
-#
-# Define NEEDS_IDN_WITH_CURL if you need -lidn when using -lcurl (Minix).
-#
 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin).
 #
 # Define NEEDS_LIBINTL_BEFORE_LIBICONV if you need libintl before libiconv.
@@ -1307,20 +1310,17 @@ else
        ifdef CURLDIR
                # Try "-Wl,-rpath=$(CURLDIR)/$(lib)" in such a case.
                BASIC_CFLAGS += -I$(CURLDIR)/include
-               CURL_LIBCURL = -L$(CURLDIR)/$(lib) $(CC_LD_DYNPATH)$(CURLDIR)/$(lib) -lcurl
+               CURL_LIBCURL = -L$(CURLDIR)/$(lib) $(CC_LD_DYNPATH)$(CURLDIR)/$(lib)
        else
-               CURL_LIBCURL = -lcurl
-       endif
-       ifdef NEEDS_SSL_WITH_CURL
-               CURL_LIBCURL += -lssl
-               ifdef NEEDS_CRYPTO_WITH_SSL
-                       CURL_LIBCURL += -lcrypto
-               endif
-       endif
-       ifdef NEEDS_IDN_WITH_CURL
-               CURL_LIBCURL += -lidn
+               CURL_LIBCURL =
        endif
 
+ifdef CURL_LDFLAGS
+       CURL_LIBCURL += $(CURL_LDFLAGS)
+else
+       CURL_LIBCURL += $(shell $(CURL_CONFIG) --libs)
+endif
+
        REMOTE_CURL_PRIMARY = git-remote-http$X
        REMOTE_CURL_ALIASES = git-remote-https$X git-remote-ftp$X git-remote-ftps$X
        REMOTE_CURL_NAMES = $(REMOTE_CURL_PRIMARY) $(REMOTE_CURL_ALIASES)

diff --git a/config.mak.uname b/config.mak.uname
index 8acdeb71fdab3b3e8e3c536110eb6de13f14e8ff..19e6633040b1db4a148d7b33c4e9d374fe7f87ba 100644 (file)
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -431,8 +431,6 @@ ifeq ($(uname_S),Minix)
        NO_NSEC = YesPlease
        NEEDS_LIBGEN =
        NEEDS_CRYPTO_WITH_SSL = YesPlease
-       NEEDS_IDN_WITH_CURL = YesPlease
-       NEEDS_SSL_WITH_CURL = YesPlease
        NEEDS_RESOLV =
        NO_HSTRERROR = YesPlease
        NO_MMAP = YesPlease
@@ -458,7 +456,6 @@ ifeq ($(uname_S),NONSTOP_KERNEL)
        # Missdetected, hence commented out, see below.
        #NO_CURL = YesPlease
        # Added manually, see above.
-       NEEDS_SSL_WITH_CURL = YesPlease
        HAVE_LIBCHARSET_H = YesPlease
        HAVE_STRINGS_H = YesPlease
        NEEDS_LIBICONV = YesPlease

diff --git a/configure.ac b/configure.ac
index e11b7976ab1c93d8ccec2e499d0093db42551059..44e8c036b6ec417e95ca4e5c2861785900d8634c 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -600,17 +600,14 @@ AC_CHECK_PROG([CURL_CONFIG], [curl-config],
 
 if test $CURL_CONFIG != no; then
     GIT_CONF_SUBST([CURL_CONFIG])
-    if test -z "${NO_OPENSSL}"; then
-      AC_MSG_CHECKING([if Curl supports SSL])
-      if test $(curl-config --features|grep SSL) = SSL; then
-         NEEDS_SSL_WITH_CURL=YesPlease
-         AC_MSG_RESULT([yes])
-      else
-         NEEDS_SSL_WITH_CURL=
-         AC_MSG_RESULT([no])
-      fi
-      GIT_CONF_SUBST([NEEDS_SSL_WITH_CURL])
+
+    if test -z "$CURL_CONFIG_OPTS"; then
+        CURL_CONFIG_OPTS="--libs"
     fi
+
+    CURL_LDFLAGS=$($CURL_CONFIG $CURL_CONFIG_OPTS)
+    AC_MSG_NOTICE([Setting CURL_LDFLAGS to '$CURL_LDFLAGS'])
+    GIT_CONF_SUBST([CURL_LDFLAGS], [$CURL_LDFLAGS])
 fi
 
 fi