From 89d25559e0e4920694f2ae9af373094b89546bc0 Mon Sep 17 00:00:00 2001
From: Alexander Egorenkov <egorenar@linux.ibm.com>
Date: Thu, 24 Jun 2021 10:06:23 +0200
Subject: [PATCH] hsavmcore: Disable systemd support during build if systemd
 header not found
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Check for systemd C header and disable systemd support even if HAVE_SYSTEMD
make variable is set to 1.

Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Acked-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
---
 hsavmcore/Makefile | 35 ++++++++++++++++-------------------
 1 file changed, 16 insertions(+), 19 deletions(-)

diff --git a/hsavmcore/Makefile b/hsavmcore/Makefile
index fc10c124..b75fe24c 100644
--- a/hsavmcore/Makefile
+++ b/hsavmcore/Makefile
@@ -21,26 +21,30 @@ else # HAVE_FUSE
 # FUSE
 #
 ifneq ($(shell sh -c 'command -v pkg-config'),)
-FUSE_CFLAGS = $(shell pkg-config --silence-errors --cflags fuse)
-FUSE_LDLIBS = $(shell pkg-config --silence-errors --libs fuse)
+  FUSE_CFLAGS = $(shell pkg-config --silence-errors --cflags fuse)
+  FUSE_LDLIBS = $(shell pkg-config --silence-errors --libs fuse)
 else
-FUSE_CFLAGS = -I/usr/include/fuse
-FUSE_LDLIBS = -lfuse
+  FUSE_CFLAGS = -I/usr/include/fuse
+  FUSE_LDLIBS = -lfuse
 endif
 
 #
 # systemd
 #
 ifneq (${HAVE_SYSTEMD},0)
-ifneq ($(shell sh -c 'command -v pkg-config'),)
-SYSTEMD_CFLAGS = $(shell pkg-config --silence-errors --cflags libsystemd)
-SYSTEMD_LDLIBS = $(shell pkg-config --silence-errors --libs libsystemd)
-else
-SYSTEMD_CFLAGS =
-SYSTEMD_LDLIBS = -lsystemd
+  ifeq ($(call check_header_prereq,"systemd/sd-daemon.h"),yes)
+    ifneq ($(shell sh -c 'command -v pkg-config'),)
+      SYSTEMD_CFLAGS = $(shell pkg-config --silence-errors --cflags libsystemd)
+      SYSTEMD_LDLIBS = $(shell pkg-config --silence-errors --libs libsystemd)
+    else
+      SYSTEMD_CFLAGS =
+      SYSTEMD_LDLIBS = -lsystemd
+    endif
+    ALL_CPPFLAGS += -DHAVE_SYSTEMD
+  else
+    $(warning "systemd support disabled")
+  endif
 endif
-ALL_CPPFLAGS += -DHAVE_SYSTEMD
-endif # HAVE_SYSTEMD
 
 ALL_CPPFLAGS += -D_FILE_OFFSET_BITS=64
 ALL_CFLAGS += $(FUSE_CFLAGS) $(SYSTEMD_CFLAGS)
@@ -68,13 +72,6 @@ check_dep:
 		"fuse.h", \
 		"fuse-devel or libfuse-dev", \
 		"HAVE_FUSE=0")
-ifneq (${HAVE_SYSTEMD},0)
-	$(call check_dep, \
-		"hsavmcore", \
-		"systemd/sd-daemon.h", \
-		"systemd-devel or libsystemd-dev", \
-		"HAVE_SYSTEMD=0")
-endif
 
 hsavmcore: $(OBJECTS) $(libs)
 	$(LINK) $(ALL_LDFLAGS) $^ $(LDLIBS) -o $@