configure: Move the error message for pkg-config earlier

Once pkg-config cannot be found, there's no point in running the rest
of the configure script since it will just spew a bunch of errors due
to missing pkg-config.

So, stop early and let the user know that pkg-config needs to be
installed.

diff --git a/configure b/configure
index a79960700aeb0fa44ebdcd20da0452fd296e75a4..44c3356ca3e2b5e8e7749029fabc68f38207d24f 100755 (executable)
--- a/configure
+++ b/configure
@@ -192,10 +192,29 @@ EOF
 
 errors=0
 
 
 errors=0
 

+printf "Checking for pkg-config... "

 if pkg-config --version > /dev/null 2>&1; then
 if pkg-config --version > /dev/null 2>&1; then

-    have_pkg_config=1
+    printf "Yes.\n"

 else
 else

-    have_pkg_config=0
+    printf "No.\n"
+    cat <<EOF
+
+*** Error: This configure script requires pkg-config to find the
+compilation flags required to link against the various libraries
+needed by ${PROJECT}. The pkg-config program can be obtained from:
+
+       http://www.freedesktop.org/wiki/Software/pkg-config/
+
+Or you may be able install it with a command such as:
+
+       sudo apt-get install pkg-config
+    or:
+       sudo yum install pkgconfig
+
+EOF
+
+exit 1
+

 fi
 
 printf "Checking for talloc development files... "
 fi
 
 printf "Checking for talloc development files... "


@@ -332,26 +351,6 @@ Or on Fedora and similar systems:
 On other systems, similar commands can be used, but the details of the
 package names may be different.
 
 On other systems, similar commands can be used, but the details of the
 package names may be different.
 

-EOF
-    if [ $have_pkg_config -eq 0 ]; then
-cat <<EOF
-Note: the pkg-config program is not available. This configure script
-uses pkg-config to find the compilation flags required to link against
-the various libraries needed by ${PROJECT}. It's possible you simply need
-to install pkg-config with a command such as:
-
-       sudo apt-get install pkg-config
-Or:
-       sudo yum install pkgconfig
-
-But if pkg-config is not available for your system, then you will need
-to modify the configure script to manually set the cflags and ldflags
-variables to the correct values to link against each library in each
-case that pkg-config could not be used to determine those values.
-
-EOF
-    fi
-cat <<EOF

 When you have installed the necessary dependencies, you can run
 configure again to ensure the packages can be found, or simply run
 "make" to compile.
 When you have installed the necessary dependencies, you can run
 configure again to ensure the packages can be found, or simply run
 "make" to compile.