From 0d3a5ecb231956876009ea2332d9ca13fd20c7f9 Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fl.fischer@fau.de>
Date: Mon, 22 Feb 2021 17:00:54 +0100
Subject: [PATCH] [meson] only build fsearch if walk_dir compiles and links
---
apps/fsearch/meson.build | 27 +++++++++++++++++----------
1 file changed, 17 insertions(+), 10 deletions(-)
diff --git a/apps/fsearch/meson.build b/apps/fsearch/meson.build
index 9dc41f5c..68a9fd10 100644
--- a/apps/fsearch/meson.build
+++ b/apps/fsearch/meson.build
@@ -1,11 +1,18 @@
-fsearch_exe = executable(
- 'fsearch',
- 'fsearch.cpp',
- dependencies: emper_dep,
-)
+walk_dir_code = '''#include <filesystem>
+int main() { auto it = std::filesystem::recursive_directory_iterator("."); }
+'''
-fsearch_callback_exe = executable(
- 'fsearch_callback',
- 'fsearch_callback.cpp',
- dependencies: emper_dep,
-)
+does_link = cpp_compiler.links(walk_dir_code, args: '--std=c++2a', name : 'walk_dir')
+if does_link
+ fsearch_exe = executable(
+ 'fsearch',
+ 'fsearch.cpp',
+ dependencies: emper_dep,
+ )
+
+ fsearch_callback_exe = executable(
+ 'fsearch_callback',
+ 'fsearch_callback.cpp',
+ dependencies: emper_dep,
+ )
+endif
--
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