Android NDK support and build system refactoring (#585)

samples/libcurl/README.md

@@ -1,6 +1,7 @@
 # HTTP client
 
  This example shows how to communicate with libcurl, HTTP/HTTPS/FTP/etc client library.
+ Debian-like distros may need to `apt-get install libcurl4-openssl-dev`.
 To build use `./build.sh` script without arguments (or specify `TARGET` variable if cross-compiling).
 You also may use Gradle to build this sample: `../gradlew build`.
 

samples/libcurl/build.sh

@@ -4,7 +4,7 @@ PATH=../../dist/bin:../../bin:$PATH
 DIR=.
 
 CFLAGS_macbook=-I/opt/local/include
-CFLAGS_linux=-I/usr/include
+CFLAGS_linux=-I/usr/include/x86_64-linux-gnu
 LINKER_ARGS_macbook="-L/opt/local/lib -lcurl"
 LINKER_ARGS_linux="-L/usr/lib/x86_64-linux-gnu -lcurl"
 
@@ -23,5 +23,5 @@ LINKER_ARGS=${!var}
 var=COMPILER_ARGS_${TARGET}
 COMPILER_ARGS=${!var} # add -opt for an optimized build.
 
-cinterop -copt "$CFLAGS" -copt -I. -def $DIR/libcurl.def -target $TARGET -o libcurl.bc || exit 1
+cinterop -copt "$CFLAGS" -copt -I. -copt -I/usr/include -def $DIR/libcurl.def -target $TARGET -o libcurl.bc || exit 1
 konanc -target $TARGET src -library libcurl.bc -linkerArgs "$LINKER_ARGS" -o Curl.kexe || exit 1