meson: Fix nasm detection

nasm -v can actually fail for example on macOS, where nasm could be a
stub executable that forwards commands to the real nasm, but if the real
nasm is not installed, fails.
This would lead to a confusing error message due to the out of bounds
array access, to avoid that, explicitly check the exit code.

1 files changed, 5 insertions, 0 deletions

diff --git a/meson.build b/meson.build
index 32e8f97..bafe20a 100644
--- a/meson.build
+++ b/meson.build
@@ -339,6 +339,11 @@ if is_asm_enabled and host_machine.cpu_family().startswith('x86')
     # check NASM version
     if nasm.found()
         nasm_r = run_command(nasm, '-v')
+
+        if nasm_r.returncode() != 0
+            error('failed running nasm to obtain its version')
+        endif
+
         out = nasm_r.stdout().strip().split()
         if out[1].to_lower() == 'version'
             if out[2].version_compare('<2.13.02')