There are situations, ie during cross compilation, where curl-config program
is not present in the PATH.

Make configure check that a custom curl-config program is passed by the user
through ac_cv_prog_CURL_CONFIG then set CURL_CONFIG variable accordingly in
config.mak.autogen. Makefile uses this variable to get the target's curl
configuration program.

Signed-off-by: Remi Pommarel <r...@triplefau.lt>
---
 Makefile     |  5 +++--
 configure.ac | 10 ++++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index ce0cfe2..81ac5bb 100644
--- a/Makefile
+++ b/Makefile
@@ -374,6 +374,7 @@ LDFLAGS =
 ALL_CFLAGS = $(CPPFLAGS) $(CFLAGS)
 ALL_LDFLAGS = $(LDFLAGS)
 STRIP ?= strip
+CURL_CONFIG=curl-config
 
 # Among the variables below, these:
 #   gitexecdir
@@ -1059,13 +1060,13 @@ else
        REMOTE_CURL_NAMES = $(REMOTE_CURL_PRIMARY) $(REMOTE_CURL_ALIASES)
        PROGRAM_OBJS += http-fetch.o
        PROGRAMS += $(REMOTE_CURL_NAMES)
-       curl_check := $(shell (echo 070908; curl-config --vernum | sed -e 
'/^70[BC]/s/^/0/') 2>/dev/null | sort -r | sed -ne 2p)
+       curl_check := $(shell (echo 070908; $(CURL_CONFIG) --vernum | sed -e 
'/^70[BC]/s/^/0/') 2>/dev/null | sort -r | sed -ne 2p)
        ifeq "$(curl_check)" "070908"
                ifndef NO_EXPAT
                        PROGRAM_OBJS += http-push.o
                endif
        endif
-       curl_check := $(shell (echo 072200; curl-config --vernum | sed -e 
'/^70[BC]/s/^/0/') 2>/dev/null | sort -r | sed -ne 2p)
+       curl_check := $(shell (echo 072200; $(CURL_CONFIG) --vernum | sed -e 
'/^70[BC]/s/^/0/') 2>/dev/null | sort -r | sed -ne 2p)
        ifeq "$(curl_check)" "072200"
                USE_CURL_FOR_IMAP_SEND = YesPlease
        endif
diff --git a/configure.ac b/configure.ac
index 14012fa..acc23fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -525,6 +525,16 @@ GIT_UNSTASH_FLAGS($CURLDIR)
 
 GIT_CONF_SUBST([NO_CURL])
 
+if test -z "$NO_CURL"; then
+
+AC_CHECK_PROG([CURL_CONFIG], [curl-config], [curl-config], [no])
+if test $CURL_CONFIG != no; then
+    GIT_CONF_SUBST([CURL_CONFIG])
+fi
+
+fi
+
+
 #
 # 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.
-- 
2.0.1

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