build: Use HTOP_PKG_CHECK_MODULES in hwloc and libnl checking

Reduce duplicate code in configure.ac. No changes in behaviors.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>

Author: Explorer09

configure.ac

@@ -1133,17 +1133,11 @@ case "$enable_hwloc" in
    no)
       ;;
    yes)
-      m4_ifdef(
-         [PKG_PROG_PKG_CONFIG],
+      HTOP_PKG_CHECK_MODULES(HWLOC, hwloc,
          [
-            PKG_CHECK_MODULES(HWLOC, hwloc, [
-               AM_CFLAGS="$AM_CFLAGS $HWLOC_CFLAGS"
-               LIBS="$LIBS $HWLOC_LIBS"
-               AC_DEFINE([HAVE_LIBHWLOC], [1], [Define to 1 if you have the 'hwloc' library (-lhwloc).])
-            ], [
-               AC_CHECK_LIB([hwloc], [hwloc_get_proc_cpubind], [], [AC_MSG_ERROR([can not find required library libhwloc])])
-               AC_CHECK_HEADERS([hwloc.h], [], [AC_MSG_ERROR([can not find require header file hwloc.h])])
-            ])
+            AM_CFLAGS="$AM_CFLAGS $HWLOC_CFLAGS"
+            LIBS="$LIBS $HWLOC_LIBS"
+            AC_DEFINE([HAVE_LIBHWLOC], [1], [Define to 1 if you have the 'hwloc' library (-lhwloc).])
          ], [
             AC_CHECK_LIB([hwloc], [hwloc_get_proc_cpubind], [], [AC_MSG_ERROR([can not find required library libhwloc])])
             AC_CHECK_HEADERS([hwloc.h], [], [AC_MSG_ERROR([can not find require header file hwloc.h])])
@@ -1338,11 +1332,7 @@ esac
 case "$enable_delayacct" in
    check|yes)
       if test "x${LIBNL3_CFLAGS+y}" = x; then
-         m4_ifdef(
-            [PKG_PROG_PKG_CONFIG],
-            [PKG_CHECK_MODULES(LIBNL3, libnl-3.0, [], [LIBNL3_CFLAGS="-I/usr/include/libnl3"])],
-            [LIBNL3_CFLAGS="-I/usr/include/libnl3"]
-         )
+         HTOP_PKG_CHECK_MODULES(LIBNL3, libnl-3.0, [], [LIBNL3_CFLAGS="-I/usr/include/libnl3"])
       fi
 
       htop_save_CFLAGS=$CFLAGS