[PATCH 5/6] Add tcc build stage

Omit OpenBSD for now as it shows a build error. Could be a problem on
the committer level, though. ;-)

Also omit FreeBSD as the tcc is currently unmaintained there.
---
 .builds/alpine.yml | 8 ++++++++
 .builds/debian.yml | 7 +++++++
 2 files changed, 15 insertions(+)

diff --git a/.builds/alpine.yml b/.builds/alpine.yml
index 06c61dbd..3b59fc63 100644
--- a/.builds/alpine.yml
+++ b/.builds/alpine.yml
@@ -10,6 +10,8 @@ packages:
 - ncurses-dev
 - openssl-dev
 - perl
+- tcc
+- tcc-libs-static
 sources:
 - https://git.sr.ht/~mutt/mutt
 tasks:
@@ -43,3 +45,9 @@ tasks:
         --with-sasl \
         --with-idn2
     make -j4 CFLAGS='-Wall -Werror'
+
+- tcc: |
+    cd mutt
+    autoreconf -if
+    CC=tcc ./configure
+    make -j4 CFLAGS='-Wall -Werror'
diff --git a/.builds/debian.yml b/.builds/debian.yml
index c4fa265d..83a3c87e 100644
--- a/.builds/debian.yml
+++ b/.builds/debian.yml
@@ -9,6 +9,7 @@ packages:
 - libncurses-dev
 - libsasl2-dev
 - libssl-dev
+- tcc
 sources:
 - https://git.sr.ht/~mutt/mutt
 tasks:
@@ -41,3 +42,9 @@ tasks:
         --with-ssl \
         --with-sasl
     make -j4 CFLAGS='-Wall -Werror'
+
+- tcc: |
+    cd mutt
+    autoreconf -if
+    CC=tcc ./configure
+    make -j4 CFLAGS='-Wall -Werror'
-- 
2.51.0