From 0e6e05f8bec1fb451375d71a6b929a6908c5689d Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Wed, 18 Mar 2020 17:39:18 +0100
Subject: [PATCH] kamcmd: use pkg-config to get compile flags for lib readline

---
 utils/kamcmd/Makefile | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/utils/kamcmd/Makefile b/utils/kamcmd/Makefile
index aae4f1394ce..c8a7e6807eb 100644
--- a/utils/kamcmd/Makefile
+++ b/utils/kamcmd/Makefile
@@ -18,6 +18,17 @@ readline_localpath=$(LOCALBASE)/include/readline/readline.h
 readline_locations= /usr/include/readline/readline.h \
 					$(readline_localpath)
 
+ifeq ($(CROSS_COMPILE),)
+	BUILDER = $(shell which pkg-config)
+ifneq ($(BUILDER),)
+	PKGREADLINE = $(shell $(BUILDER) --exists readline > /dev/null 2>&1 ; echo $$? )
+ifneq ($(PKGREADLINE),0)
+	BUILDER =
+endif
+endif
+endif
+
+
 use_readline ?=
 ifneq (,$(MAKECMDGOALS))
 ifeq (,$(filter-out $(nodep_targets),$(MAKECMDGOALS)))
@@ -66,6 +77,12 @@ ifneq (,$(findstring cygwin, $(OS)))
 	LIBS:= -lresolv
 endif
 
+# detect libreadline
+ifneq ($(BUILDER),)
+	DEFS += $(shell $(BUILDER) --cflags readline)
+	LIBS += $(shell $(BUILDER) --libs readline)
+	use_readline := 1
+else
 ifeq ($(use_readline),)
 readline_path := $(shell  \
 						for r in $(readline_locations) ""; do \
@@ -93,14 +110,20 @@ endif
 	LIBS+=-lreadline -lncurses
 endif
 
-endif
+endif  # ifeq ($(use_readline),1)
+
+endif  # ifneq ($(BUILDER),)
 
 
 include $(COREPATH)/Makefile.utils
 
 ifeq (,$(quiet))
 ifeq ($(use_readline),1)
+ifneq ($(BUILDER),)
+$(info readline detected via pkg-config)
+else
 $(info readline detected ($(readline_path)) )
+endif
 $(info command completion enabled)
 else
 $(info "no readline include files detected, disabling readline support")