From: Willy Tarreau <w@1wt.eu>
Date: Thu, 22 Dec 2022 18:44:35 +0000 (+0100)
Subject: BUILD: makefile: add a function to collect all options' CFLAGS/LDFLAGS
X-Git-Tag: v2.8-dev1~59
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8fa2f49f244c37960f0ebd5fb0b9518e4dd91f0a;p=thirdparty%2Fhaproxy.git

BUILD: makefile: add a function to collect all options' CFLAGS/LDFLAGS

The new function collect_opts_flags now scans all USE_* options defined
in use_opts and appends the corresponding *_CFLAGS and *_LDFLAGS to
OPTIONS_{C,LD}FLAGS respectively. This will be useful to get rid of all
the individual concatenations to these variables.
---

diff --git a/include/make/options.mk b/include/make/options.mk
index f439be345a..9e96f875ce 100644
--- a/include/make/options.mk
+++ b/include/make/options.mk
@@ -37,3 +37,16 @@ reset_opt_vars = $(foreach name,INC LIB CFLAGS LDFLAGS SRC,$(eval $(1)_$(name)=)
 
 # preset all variables for all supported build options among use_opts
 reset_opts_vars = $(foreach opt,$(patsubst USE_%,%,$(use_opts)) SSL WOLFSSL,$(call reset_opt_vars,$(opt)))
+
+# append $(1)_{C,LD}FLAGS into OPTIONS_{C,LD}FLAGS if not empty
+define collect_opt_flags =
+  ifneq ($$($(1)_CFLAGS),)
+    OPTIONS_CFLAGS += $$($(1)_CFLAGS)
+  endif
+  ifneq ($$($(1)_LDFLAGS),)
+    OPTIONS_LDFLAGS += $$($(1)_LDFLAGS)
+  endif
+endef
+
+# collect all known USE_foo's foo_{C,LD}FLAGS into OPTIONS_{C,LD}FLAGS
+collect_opts_flags = $(foreach opt,$(patsubst USE_%,%,$(use_opts)) SSL,$(eval $(call collect_opt_flags,$(opt))))