python3-scipy: simplify template

- Meson-aware numpy helper and pep517 style eliminate a lot of
  environment setup

- python3-pybind "system" files eliminates still more

- Remove obsolete CC, CXXFLAGS overrides

srcpkgs/python3-scipy/template

@@ -3,9 +3,10 @@ pkgname=python3-scipy
 version=1.11.2
 revision=1
 build_style=python3-pep517
-build_helper="meson"
-make_build_args="--no-isolation --wheel
- $(vopt_if openblas "" "-Csetup-args=-Dblas=blas -Csetup-args=-Dlapack=lapack")"
+build_helper="meson numpy"
+make_build_args="
+ $(vopt_if openblas "" "-Csetup-args=-Dblas=blas -Csetup-args=-Dlapack=lapack")
+"
 hostmakedepends="python3-build python3-installer python3-meson-python
  python3-wheel python3-Cython python3-pybind11 pythran python3-numpy
  gcc-fortran pkg-config"
@@ -22,20 +23,6 @@ make_check="no" # Tests need an installed copy to run and meson makes this tough
 
 build_options="openblas"
 
-if [ "$CROSS_BUILD" ]; then
-	make_build_args+="
-	 -Csetup-args=--cross-file=${XBPS_WRAPPERDIR}/meson/xbps_meson.cross
-	 -Csetup-args=--cross-file=${XBPS_WRAPPERDIR}/meson/python.cross
-	"
-
-	_pybind11_dir="${py3_sitelib}/pybind11"
-	export PKG_CONFIG_PATH="${XBPS_CROSS_BASE}/${_pybind11_dir}/share/pkgconfig"
-	# pybind11 uses a path relative to the pkgconfig file to set $prefix,
-	# which causes the wrapper to double-include $XBPS_CROSS_BASE; override
-	# so that the wrapper properly points to the right location
-	export PKG_CONFIG_PYBIND11_PREFIX="/${_pybind11_dir}"
-fi
-
 case "$XBPS_TARGET_MACHINE" in
 	x86_64*|i686*|aarch64*|armv[67]*|ppc64*)
 		# Prefer accelerated routines where available
@@ -51,26 +38,6 @@ if [ "$build_option_openblas" ]; then
 	esac
 fi
 
-post_patch() {
-	if [ "$CROSS_BUILD" ]; then
-		local _xpy="${XBPS_CROSS_BASE}/${py3_sitelib}"
-		cat > "${XBPS_WRAPPERDIR}/meson/python.cross" <<-EOF
-			[properties]
-			numpy-include-dir = '${_xpy}/numpy/core/include'
-			pythran-include-dir = '${_xpy}/pythran'
-			EOF
-	fi
-}
-
-pre_build() {
-	if [ "$CROSS_BUILD" ]; then
-		# Meson can't tolerate $CC with arguments as set by the build helper
-		CC="${XBPS_CROSS_TRIPLET}-gcc"
-		# CXX needs to know where to find Python headers
-		CXXFLAGS+=" -I${XBPS_CROSS_BASE}/${py3_inc}"
-	fi
-}
-
 post_install() {
 	vlicense LICENSE.txt
 }