build: use pkg-config for qmi-framework discovery

Makefile.am

@@ -1,26 +1,26 @@
 # Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved.
 # SPDX-License-Identifier: BSD-3-Clause
 
+QMIF_CPPFLAGS = @QMIF_CFLAGS@
+QMIF_LDADD = @QMIF_LIBS@
+
 AM_CFLAGS = -Wundef \
         -Wstrict-prototypes \
         -Wno-trigraphs \
         -g -O0 \
         -fno-inline \
         -fno-short-enums \
         -fpic \
-        $(QMIF_CFLAGS) \
+        $(QMIF_CPPFLAGS) \
         -I.
 
 h_sources = ./time_service_v01.h \
             ./localdefs.h \
             ./time_genoff_i.h
 
-requiredlibs = $(QMIF_LIBS) -lqcci -lqcsi -lqencdec -lqmi_common
+requiredlibs = $(QMIF_LDADD)
 
 bin_PROGRAMS = time_daemon
 time_daemon_SOURCES = time_daemon.c time_service_v01.c
 time_daemon_LDADD = $(requiredlibs)
 time_daemon_LDFLAGS = -lpthread  @GLIB_LIBS@
-
-# Systemd service file installation
-systemdsystemunit_DATA = time-daemon.service

build_script.sh

@@ -45,7 +45,12 @@ echo "Running autoreconf.."
 autoreconf --install || { echo "Autoreconf failed"; exit 1; }
 
 echo "Running configure.."
-./configure --host=$HOST_ARCH  --with-qmif-prefix=$QMI_PREFIX --prefix=$(pwd)/install || { echo "configure failed"; exit 1; }
+if [ -n "$QMI_PREFIX" ]; then
+    export PKG_CONFIG_PATH="${QMI_PREFIX}/lib/pkgconfig:${PKG_CONFIG_PATH}"
+    ./configure --host=$HOST_ARCH --with-qmi-prefix=$QMI_PREFIX --prefix=$(pwd)/install || { echo "configure failed"; exit 1; }
+else
+    ./configure --host=$HOST_ARCH --prefix=$(pwd)/install || { echo "configure failed"; exit 1; }
+fi
 
 echo "Running make.."
 make || { echo "make failed"; exit 1; }

configure.ac

@@ -27,11 +27,16 @@ AC_PROG_MAKE_SET
 PKG_PROG_PKG_CONFIG
 
 # Checks for libraries with user.
-AC_ARG_WITH([qmif-prefix],
-    [AS_HELP_STRING([--with-qmif-prefix=PATH], [Path to qmi-framework installation])],
-    [QMIF=$withval], [QMIF=/usr/local])
-QMIF_CFLAGS="-I ${QMIF}/include/qmi_framework"
-QMIF_LIBS="-L${QMIF}/lib/"
+AC_ARG_WITH([qmi-prefix],
+    [AS_HELP_STRING([--with-qmi-prefix=PATH],
+     [Fallback path to qmi-framework if pkg-config cannot find it])],
+    [QMIF_PREFIX=$withval], [QMIF_PREFIX=])
+PKG_CHECK_MODULES([QMIF], [qmi-framework],
+    [QMIF_CFLAGS="-I`$PKG_CONFIG --variable=prefix qmi-framework`/include/qmi_framework"],
+    [AS_IF([test -n "$QMIF_PREFIX"],
+        [QMIF_CFLAGS="-I${QMIF_PREFIX}/include/qmi_framework"
+         QMIF_LIBS="-L${QMIF_PREFIX}/lib -lqcci -lqcsi -lqencdec -lqmi_common"],
+        [AC_MSG_ERROR([qmi-framework not found via pkg-config and --with-qmi-prefix not specified])])])
 AC_SUBST([QMIF_CFLAGS])
 AC_SUBST([QMIF_LIBS])
 CFLAGS="$CFLAGS  -DSYSLOG_ENABLE"
@@ -41,14 +46,6 @@ PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.16, dummy=yes, AC_MSG_ERROR(GLib >= 2.16 i
 GLIB_LIBS="$GLIB_LIBS $GTHREAD_LIBS"
 AC_SUBST(GLIB_LIBS)
 
-# Systemd service file installation directory (no systemd dependency required)
-AC_ARG_WITH([systemdsystemunitdir],
-    [AS_HELP_STRING([--with-systemdsystemunitdir=DIR], 
-     [Directory for systemd service files (default: ${prefix}/lib/systemd/system)])],
-    [systemdsystemunitdir=$withval],
-    [systemdsystemunitdir='${prefix}/lib/systemd/system'])
-
-AC_SUBST([systemdsystemunitdir])
 
 AC_CONFIG_FILES([ \
         Makefile \