[PATCH v7 025/104] tests/tcg/meson.build: let test infrastructure detect compiler

Now we moved back flags to tests/tcg/meson.build, we don't need to
expose cc anymore in target files.
This will allow us to easily introduce cross containers.
Also, we can reuse the skip_test logic to gracefully report why tests
don't run.

Reviewed-by: Manos Pitsidianakis <[email protected]>
Tested-by: Aniket Sahu <[email protected]>
Signed-off-by: Pierrick Bouvier <[email protected]>
---
 tests/tcg/meson.build | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/tests/tcg/meson.build b/tests/tcg/meson.build
index c227bb52381..9c00d21f059 100644
--- a/tests/tcg/meson.build
+++ b/tests/tcg/meson.build
@@ -19,7 +19,7 @@ tcg_tests = {}
 #
 # {
 #   'name_of_target': {
-#     'cc': cross_compiler,
+#     'cc': 'cross_compiler',
 #     'cc_feat_cflags': {
 #       'name': ['feature cflags'],
 #       ...
@@ -96,7 +96,7 @@ foreach target, plan: tcg_tests
     endif
   endforeach
 
-  cc = plan['cc']
+  cc = find_program(plan['cc'], required : false)
   folder = plan['folder']
   gdb_arch = plan['gdb_arch']
   qemu = plan['qemu']
@@ -189,9 +189,13 @@ foreach target, plan: tcg_tests
       if 'cc_feat' in setup
         cc_feat = setup['cc_feat']
         if cc_feat not in cc_has_feat
-          cmd = run_command([cc, cc_check_args, cc_feat_cflags[cc_feat]],
-                            check: false)
-          avail = cmd.returncode() == 0
+          avail = false
+          if cc.found()
+            cmd = run_command([cc, '-xc', '/dev/null', '-o', '/dev/null', '-c',
+                               cc_feat_cflags[cc_feat]],
+                              check: false)
+            avail = cmd.returncode() == 0
+          endif
           cc_has_feat += {cc_feat: avail}
         endif
 
@@ -202,6 +206,11 @@ foreach target, plan: tcg_tests
         cflags += cc_feat_cflags[cc_feat]
       endif
 
+      if not cc.found()
+        skip_test = 'compiler ' + plan['cc'] + ' not available'
+        built_tests += {exe_name: exe_name}
+      endif
+
       # build executable if needed
       if exe_name not in built_tests
         exe = custom_target(exe_name,
-- 
2.43.0