From a21310be1ea586edf26508641dfbdcb2cae3edcd Mon Sep 17 00:00:00 2001
From: Delyan Angelov <delian66@gmail.com>
Date: Fri, 30 Jan 2026 10:15:05 +0200
Subject: [PATCH] v2: ease the testing with different C compilers, using
 `CVERBOSE=1 CC=tcc CFLAGS=-I/usr/local/lib/tcc/include ./v2 -backend cleanc
 hello.v`

---
 cmd/v2/.gitignore         | 1 +
 cmd/v2/hello.v            | 3 +++
 vlib/v2/builder/builder.v | 7 ++++++-
 3 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 cmd/v2/.gitignore
 create mode 100644 cmd/v2/hello.v

diff --git a/cmd/v2/.gitignore b/cmd/v2/.gitignore
new file mode 100644
index 000000000..064a8d8ef
--- /dev/null
+++ b/cmd/v2/.gitignore
@@ -0,0 +1 @@
+*.c
diff --git a/cmd/v2/hello.v b/cmd/v2/hello.v
new file mode 100644
index 000000000..24c0d2aa2
--- /dev/null
+++ b/cmd/v2/hello.v
@@ -0,0 +1,3 @@
+fn main() {
+	println('hello world')
+}
diff --git a/vlib/v2/builder/builder.v b/vlib/v2/builder/builder.v
index 9d9eafddd..8b7ef0d88 100644
--- a/vlib/v2/builder/builder.v
+++ b/vlib/v2/builder/builder.v
@@ -124,7 +124,12 @@ fn (mut b Builder) gen_cleanc() {
 		// Compile C to binary
 		cc_start := sw.elapsed()
 		cc := os.getenv_opt('CC') or { 'cc' }
-		compile_result := os.execute('${cc} -w ${c_file} -o ${output_name} -ferror-limit=0')
+		cc_flags := os.getenv_opt('CFLAGS') or { '' }
+		cc_cmd := '${cc} ${cc_flags} -w ${c_file} -o ${output_name} -ferror-limit=0'
+		if os.getenv('CVERBOSE') != '' {
+			dump(cc_cmd)
+		}
+		compile_result := os.execute(cc_cmd)
 		if compile_result.exit_code != 0 {
 			eprintln('C compilation failed:')
 			lines := compile_result.output.split_into_lines()
-- 
2.39.5