[nongnu] elpa/tuareg 6989263 4/5: Run CI byte-compilation with warnings as errors

[ELPA Syncer]

branch: elpa/tuareg
commit 6989263fdf70ebff00118ad2854408e392aba233
Author: Mattias Engdegård <mattiase@acm.org>
Commit: Christophe Troestler <christophe.Troestler@umons.ac.be>

    Run CI byte-compilation with warnings as errors
    
    If this causes excessive trouble with old Emacs versions, it could be
    restricted to specific versions only.
---
 .github/workflows/test.yml | 2 +-
 Makefile                   | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5206061..93ed577 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,7 +33,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Byte-compile
-        run: make elc
+        run: make elc-werror
 
       - name: Test
         run: make check
diff --git a/Makefile b/Makefile
index e31862c..27c12ef 100644
--- a/Makefile
+++ b/Makefile
@@ -49,8 +49,11 @@ INSTALL_CP = $(CP)
 
 all elc : $(ELC) tuareg-site-file.el
 
+elc-werror: WERROR=--eval '(setq byte-compile-error-on-warn t)'
+elc-werror: elc
+
 %.elc : %.el
-       $(EMACS) --batch -L . --no-init-file -f batch-byte-compile $<
+       $(EMACS) --batch -L . --no-init-file $(WERROR) -f batch-byte-compile $<
        @echo "Files byte-compiled using $(EMACS)"
 
 install : $(INSTALL_FILES)