Restored STB detection

Dockerfile-build

@@ -1,12 +1,5 @@
-
 FROM --platform=$BUILDPLATFORM tonistiigi/xx AS xx
-
 FROM --platform=$BUILDPLATFORM alpine:3.14
-ARG TARGETPLATFORM
-
-WORKDIR	/tmp/workdir
-
-ARG	PREFIX="/tmp/install"
 
 ARG BUILD_PACKAGES="\
 	clang \
@@ -14,7 +7,6 @@ ARG BUILD_PACKAGES="\
 	cmake \
 	lld \
 	curl \
-	tree \
 	pkgconfig"
 
 RUN	apk add --no-cache ${BUILD_PACKAGES}
@@ -30,11 +22,13 @@ ARG	LMS_BUILD_PACKAGES=" \
 	wt-dev \
 	gtest-dev"
 
-# copy xx scripts to your build stage
 COPY --from=xx / /
 
+ARG TARGETPLATFORM
 RUN	xx-apk add --no-scripts --no-cache ${LMS_BUILD_PACKAGES}
 
+ARG	PREFIX="/tmp/install"
+
 # STB
 ARG	STB_VERSION=b42009b3b9d4ca35bc703f5310eedc74f584be58
 RUN \
@@ -50,7 +44,7 @@ ARG LMS_BUILD_TYPE="Release"
 RUN \
 	DIR=/tmp/lms/build && mkdir -p ${DIR} && cd ${DIR}  && \
 		xx-info is-cross && export BUILD_TESTS=OFF || export BUILD_TESTS=ON && \
-		PKG_CONFIG_PATH=/$(xx-info)/usr/lib/pkgconfig CXXFLAGS="-I${PREFIX}/include" cmake /tmp/lms/ -DCMAKE_BUILD_TYPE=${LMS_BUILD_TYPE} $(xx-clang --print-cmake-defines) -DCMAKE_PREFIX_PATH=/$(xx-info)/usr/lib/cmake -DBUILD_TESTING=${BUILD_TESTS} && \
+		PKG_CONFIG_PATH=/$(xx-info)/usr/lib/pkgconfig cmake /tmp/lms/ -DCMAKE_INCLUDE_PATH=${PREFIX}/include -DCMAKE_BUILD_TYPE=${LMS_BUILD_TYPE} $(xx-clang --print-cmake-defines) -DCMAKE_PREFIX_PATH=/$(xx-info)/usr/lib/cmake -DBUILD_TESTING=${BUILD_TESTS} && \
 		VERBOSE=1 make -j$(nproc) && \
 		xx-verify src/lms/lms && \
 		xx-info is-cross || make test

cmake/modules/FindSTB.cmake

@@ -4,7 +4,6 @@ include(FindPackageHandleStandardArgs)
 
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(
 		STB
-		FOUND_VAR STB_FOUND
 		REQUIRED_VARS STB_INCLUDE_DIR
 )