[PATCH 1/2] Makefile: avoid running curl-config multiple times

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If the user hasn't set the CURL_LDFLAGS Makefile variable, we invoke
curl-config like this:

  CURL_LIBCURL += $(shell $(CURL_CONFIG) --libs)

Because the shell function is run when the value is expanded, we invoke
curl-config each time we need to link something (which generally ends up
being four times for a full build).

Instead, let's use an immediate Makefile variable, which only needs
expanding once. We can't combine that with the existing "+=", but since
we only do this when CURL_LDFLAGS is undefined, we can just set that
variable.

That also allows us to simplify our conditional a bit, since both sides
will then put the result into CURL_LIBCURL. While we're touching it,
let's fix the indentation to match the nearby code (we're inside an
outer conditional, so everything else is indented one level).

Signed-off-by: Jeff King <peff@xxxxxxxx>
---
 Makefile | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index a5961113d8..93a8ef3a72 100644
--- a/Makefile
+++ b/Makefile
@@ -1365,11 +1365,10 @@ else
 		CURL_LIBCURL =
 	endif
 
-ifdef CURL_LDFLAGS
+	ifndef CURL_LDFLAGS
+		CURL_LDFLAGS := $(shell $(CURL_CONFIG) --libs)
+	endif
 	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
-- 
2.26.0.576.gb87790c3c1




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