From 4382e977f74e41f65170b4d9292678859c9e521f Mon Sep 17 00:00:00 2001
From: Guinness <guinness@crans.org>
Date: Tue, 17 Nov 2020 10:43:00 +0100
Subject: Add the compiler name, version and libs used to compile

This changes the behaviour of `tor --version` in such a way.
```console
src/app/tor --version
Tor version 0.4.5.1-alpha-dev (git-46ccde66a97d7985).
Tor is running on Linux with Libevent 2.1.12-stable, OpenSSL 1.1.1h, Zlib 1.2.11, Liblzma 5.2.4, Libzstd 1.4.5 and Glibc 2.31 as libc.
Tor compiled with GCC version 10.2.0
```

Fixes #32102
---
 configure.ac | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index c880375988..0a1e7b9e02 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,6 +9,8 @@ AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
 AC_CONFIG_MACRO_DIR([m4])
 
 configure_flags="$*"
+AC_DEFINE_UNQUOTED([CONFIG_FLAGS], ["$configure_flags"], [Flags passed to configure])
+
 
 # DO NOT EDIT THIS DEFINITION BY HAND UNLESS YOU KNOW WHAT YOU'RE DOING.
 #
@@ -421,6 +423,17 @@ AC_PROG_MAKE_SET
 AC_PROG_RANLIB
 AC_PROG_SED
 
+AX_COMPILER_VERSION
+AX_COMPILER_VENDOR
+
+AC_DEFINE_UNQUOTED([COMPILER_VERSION],["$ax_cv_c_compiler_version"], [Compiler version])
+AC_DEFINE_UNQUOTED([COMPILER_VENDOR],["$ax_cv_c_compiler_vendor"], [Compiler vendor])
+
+AS_CASE($ax_cv_c_compiler_vendor,
+        [gnu], AC_DEFINE([COMPILER],["GCC"],[Compiler name]),
+        AC_DEFINE([COMPILER],[],[Compiler name])
+)
+
 AC_ARG_VAR([PERL], [path to Perl binary])
 AC_CHECK_PROGS([PERL], [perl])
 AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
-- 
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