Merge pull request #979 from Tachi107/remove-include-meson.build

meson: small improvements

include/meson.build

-# SPDX-FileCopyrightText: 2021 Andrea Pappacoda
-#
-# SPDX-License-Identifier: Apache-2.0
-
-subdir('pistache')

meson.build

@@ -88,7 +88,7 @@ if meson.version().version_compare('>=0.57.0')
 else
 	# Ugly workaround for reading a file
 	version_data_raw = run_command(
-		find_program('python3'), '-c', 'print(open("version.txt").read())'
+		import('python').find_installation(), '-c', 'print(open("version.txt").read())'
 	).stdout().strip().split('\n')
 endif
 version_data_conf = configuration_data()
@@ -104,7 +104,7 @@ pistache_soversion_str = '.'.join([version_data_conf.get_unquoted('SONAME_VERSIO
 
 incl_pistache = include_directories('include')
 
-subdir('include')
+subdir('include'/'pistache')
 subdir('src')
 if get_option('PISTACHE_BUILD_TESTS')
 	subdir('tests')