Merge pull request #259 from garybuhrmaster/ci

build.yml: Use workaround for macOS builds of Tk

.github/workflows/build.yml

@@ -404,6 +404,22 @@ jobs:
       - name: Install dependencies
         run: brew install perl cpanminus openssl sqlite tcl-tk
 
+      - name: Create compiler ccflags C std override for older sources
+        run: |
+          echo "package CCflagsConfig;" >> /tmp/CCflagsConfig.pm
+          echo "use warnings;" >> /tmp/CCflagsConfig.pm
+          echo "use Config;" >> /tmp/CCflagsConfig.pm
+          echo "my \$ccflags = \$Config{ccflags};" >> /tmp/CCflagsConfig.pm
+          echo "\$ccflags .= ' -std=c89';" >> /tmp/CCflagsConfig.pm
+          echo "my \$obj = tied %Config;" >> /tmp/CCflagsConfig.pm
+          echo "\$obj->{ccflags} = \$ccflags;" >> /tmp/CCflagsConfig.pm
+          echo "1;" >> /tmp/CCflagsConfig.pm
+
+      - name: Install perl requirements that require older C standard
+        run: >
+          PERL5LIB="/tmp" PERL5OPT="-MCCflagsConfig" perl /opt/homebrew/bin/cpanm --notest --no-interactive
+          Tk
+
       - name: Install perl requirements
         run: >
           perl /opt/homebrew/bin/cpanm --notest --no-interactive
@@ -430,7 +446,6 @@ jobs:
           Memoize
           SOAP::Lite
           Term::ProgressBar
-          Tk
           Tk::TableMatrix
           Unicode::String
           Unicode::UTF8simple