From 6b597a4b588aa49f6c6055042676a6299b9dad54 Mon Sep 17 00:00:00 2001
From: CC <jeff@chipnetics.com>
Date: Thu, 7 Jul 2022 10:48:07 -0600
Subject: [PATCH] builder: add support for icc (Intel C Compiler) (#14975)

---
 doc/docs.md         |  4 ++--
 vlib/v/builder/cc.v | 11 +++++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/doc/docs.md b/doc/docs.md
index 80ef078280..45514ccbd0 100644
--- a/doc/docs.md
+++ b/doc/docs.md
@@ -22,7 +22,7 @@ The major way to get the latest and greatest V, is to __install it from source__
 It is __easy__, and it usually takes __only a few seconds__.
 
 ### Linux, macOS, FreeBSD, etc:
-You need `git`, and a C compiler like `tcc`, `gcc` or `clang`, and `make`:
+You need `git`, and a C compiler like `tcc`, `gcc`, `icc` or `clang`, and `make`:
 ```bash
 git clone https://github.com/vlang/v
 cd v
@@ -38,7 +38,7 @@ git clone https://github.com/vlang/v
 cd v
 make.bat -tcc
 ```
-NB: You can also pass one of `-gcc`, `-msvc`, `-clang` to `make.bat` instead,
+NB: You can also pass one of `-gcc`, `-msvc`, `-clang`, to `make.bat` instead,
 if you do prefer to use a different C compiler, but -tcc is small, fast, and
 easy to install (V will download a prebuilt binary automatically).
 
diff --git a/vlib/v/builder/cc.v b/vlib/v/builder/cc.v
index 94b556cacb..cfea5dc462 100644
--- a/vlib/v/builder/cc.v
+++ b/vlib/v/builder/cc.v
@@ -147,6 +147,7 @@ mut:
 	debug_mode  bool
 	is_cc_tcc   bool
 	is_cc_gcc   bool
+	is_cc_icc	bool
 	is_cc_msvc  bool
 	is_cc_clang bool
 	//
@@ -240,6 +241,7 @@ fn (mut v Builder) setup_ccompiler_options(ccompiler string) {
 	//
 	ccoptions.is_cc_tcc = ccompiler.contains('tcc') || ccoptions.guessed_compiler == 'tcc'
 	ccoptions.is_cc_gcc = ccompiler.contains('gcc') || ccoptions.guessed_compiler == 'gcc'
+	ccoptions.is_cc_icc = ccompiler.contains('icc') || ccoptions.guessed_compiler == 'icc'
 	ccoptions.is_cc_msvc = ccompiler.contains('msvc') || ccoptions.guessed_compiler == 'msvc'
 	ccoptions.is_cc_clang = ccompiler.contains('clang') || ccoptions.guessed_compiler == 'clang'
 	// For C++ we must be very tolerant
@@ -275,6 +277,15 @@ fn (mut v Builder) setup_ccompiler_options(ccompiler string) {
 		}
 		optimization_options = ['-O3', '-fno-strict-aliasing', '-flto']
 	}
+	if ccoptions.is_cc_icc {
+		if ccoptions.debug_mode {
+			debug_options = ['-g']
+			if user_darwin_version > 9 {
+				debug_options << '-no-pie'
+			}
+		}
+		optimization_options = ['-Ofast', '-fno-strict-aliasing']
+	}
 	//
 	if ccoptions.debug_mode {
 		ccoptions.args << debug_options