"pkg-config --cflags" may be empty

For example, Apache Arrow C++ is installed in system directory.
apache · Dec 19, 2022 · 3b9c72d · 3b9c72d
1 parent b26892d
commit 3b9c72d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/r/configure b/r/configure
@@ -106,7 +106,7 @@ else
     PKGCONFIG_DIRS=`pkg-config --libs-only-L --silence-errors ${PKG_CONFIG_NAME}`
   fi
 
-  if [ "$PKGCONFIG_CFLAGS" ] && [ "$PKGCONFIG_LIBS" ]; then
+  if [ "$PKGCONFIG_LIBS" != "" ]; then
     FOUND_LIB_DIR=`echo $PKGCONFIG_DIRS | sed -e 's/^-L//'`
     echo "*** Arrow C++ libraries found via pkg-config at $FOUND_LIB_DIR"
     PKG_CFLAGS="$PKGCONFIG_CFLAGS $PKG_CFLAGS"