From: Jan Engelhardt <jengelh@inai.de>
Date: 2022-12-03 14:04:21.501944293 +0100
References: https://lists.opensuse.org/archives/list/factory@lists.opensuse.org/thread/FPNDORIL6NDJD3HFQ76LQBIRBCWVG6TV/
Upstream: no

Mark a few vars as := in the hope to the cut the number of recursive
pkg-config calls at least by some amount. It's not a panacea,
you really must split the "configure" and the "build" steps
and not conflate them together. Use autotools/cmake/meson/whatever.
Not this.

---
 Makefile |   30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

Index: trace-cmd-libtracecmd-1.2.0/Makefile
===================================================================
--- trace-cmd-libtracecmd-1.2.0.orig/Makefile
+++ trace-cmd-libtracecmd-1.2.0/Makefile
@@ -221,8 +221,8 @@ LIBS ?= -ldl
 LIBTRACECMD_DIR = $(obj)/lib/trace-cmd
 LIBTRACECMD_STATIC = $(LIBTRACECMD_DIR)/libtracecmd.a
 LIBTRACECMD_SHARED = $(LIBTRACECMD_DIR)/libtracecmd.so.$(LIBTRACECMD_VERSION)
-LIBTRACECMD_SHARED_VERSION = $(shell echo $(LIBTRACECMD_SHARED) | sed -e 's/\(\.so\.[0-9]*\).*/\1/')
-LIBTRACECMD_SHARED_SO = $(shell echo $(LIBTRACECMD_SHARED) | sed -e 's/\(\.so\).*/\1/')
+LIBTRACECMD_SHARED_VERSION := $(shell echo $(LIBTRACECMD_SHARED) | sed -e 's/\(\.so\.[0-9]*\).*/\1/')
+LIBTRACECMD_SHARED_SO := $(shell echo $(LIBTRACECMD_SHARED) | sed -e 's/\(\.so\).*/\1/')
 
 export LIBTRACECMD_STATIC LIBTRACECMD_SHARED
 export LIBTRACECMD_SHARED_VERSION LIBTRACECMD_SHARED_SO
@@ -230,12 +230,12 @@ export LIBTRACECMD_SHARED_VERSION LIBTRA
 LIBTRACEEVENT=libtraceevent
 LIBTRACEFS=libtracefs
 
-TEST_LIBTRACEEVENT = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEEVENT_MIN_VERSION) $(LIBTRACEEVENT) > /dev/null 2>&1 && echo y")
-TEST_LIBTRACEFS = $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEFS_MIN_VERSION) $(LIBTRACEFS) > /dev/null 2>&1 && echo y")
+TEST_LIBTRACEEVENT := $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEEVENT_MIN_VERSION) $(LIBTRACEEVENT) > /dev/null 2>&1 && echo y")
+TEST_LIBTRACEFS := $(shell sh -c "$(PKG_CONFIG) --atleast-version $(LIBTRACEFS_MIN_VERSION) $(LIBTRACEFS) > /dev/null 2>&1 && echo y")
 
 ifeq ("$(TEST_LIBTRACEEVENT)", "y")
-LIBTRACEEVENT_CFLAGS = $(shell sh -c "$(PKG_CONFIG) --cflags $(LIBTRACEEVENT)")
-LIBTRACEEVENT_LDLAGS = $(shell sh -c "$(PKG_CONFIG) --libs $(LIBTRACEEVENT)")
+LIBTRACEEVENT_CFLAGS := $(shell sh -c "$(PKG_CONFIG) --cflags $(LIBTRACEEVENT)")
+LIBTRACEEVENT_LDLAGS := $(shell sh -c "$(PKG_CONFIG) --libs $(LIBTRACEEVENT)")
 else
 .PHONY: warning
 warning:
@@ -253,8 +253,8 @@ endif
 export LIBTRACEEVENT_CFLAGS LIBTRACEEVENT_LDLAGS
 
 ifeq ("$(TEST_LIBTRACEFS)", "y")
-LIBTRACEFS_CFLAGS = $(shell sh -c "$(PKG_CONFIG) --cflags $(LIBTRACEFS)")
-LIBTRACEFS_LDLAGS = $(shell sh -c "$(PKG_CONFIG) --libs $(LIBTRACEFS)")
+LIBTRACEFS_CFLAGS := $(shell sh -c "$(PKG_CONFIG) --cflags $(LIBTRACEFS)")
+LIBTRACEFS_LDLAGS := $(shell sh -c "$(PKG_CONFIG) --libs $(LIBTRACEFS)")
 else
 .PHONY: warning
 warning:
@@ -324,11 +324,11 @@ endif
 export ZLIB_LDLAGS
 
 ifndef NO_LIBZSTD
-TEST_LIBZSTD = $(shell sh -c "$(PKG_CONFIG) --atleast-version 1.4.0 libzstd > /dev/null 2>&1 && echo y")
+TEST_LIBZSTD := $(shell sh -c "$(PKG_CONFIG) --atleast-version 1.4.0 libzstd > /dev/null 2>&1 && echo y")
 
 ifeq ("$(TEST_LIBZSTD)", "y")
-LIBZSTD_CFLAGS = $(shell sh -c "$(PKG_CONFIG) --cflags libzstd")
-LIBZSTD_LDLAGS = $(shell sh -c "$(PKG_CONFIG) --libs libzstd")
+LIBZSTD_CFLAGS := $(shell sh -c "$(PKG_CONFIG) --cflags libzstd")
+LIBZSTD_LDLAGS := $(shell sh -c "$(PKG_CONFIG) --libs libzstd")
 CFLAGS += -DHAVE_ZSTD
 ZSTD_INSTALLED=1
 $(info    Have ZSTD compression support)
@@ -571,10 +571,10 @@ report_nopythondev: force
 	$(Q)echo
 
 ifndef NO_PYTHON
-PYTHON_INCLUDES = `$(PKG_CONFIG) --cflags $(PYTHON_PKGCONFIG_VERS)`
-PYTHON_LDFLAGS = `$(PKG_CONFIG) --libs $(PYTHON_PKGCONFIG_VERS)` \
+PYTHON_INCLUDES := `$(PKG_CONFIG) --cflags $(PYTHON_PKGCONFIG_VERS)`
+PYTHON_LDFLAGS := `$(PKG_CONFIG) --libs $(PYTHON_PKGCONFIG_VERS)` \
 		$(shell $(PYTHON_VERS)-config --ldflags)
-PYGTK_CFLAGS = `$(PKG_CONFIG) --cflags pygtk-2.0`
+PYGTK_CFLAGS := `$(PKG_CONFIG) --cflags pygtk-2.0`
 else
 PYTHON_INCLUDES =
 PYTHON_LDFLAGS =