Switch to using pcre::regex instead of boost::regex

.github/workflows/ci.yml

@@ -84,7 +84,7 @@ jobs:
 
             packages="$packages wine32"
           else
-            packages="$packages libunwind-dev libdw-dev libgtk-3-dev"
+            packages="$packages libunwind-dev libdw-dev libpcre2-dev libgtk-3-dev"
           fi
 
           if [ "${{ matrix.compiler }}" = clang ]; then
@@ -204,23 +204,6 @@ jobs:
         if: steps.cache-local.outputs.cache-hit != 'true'
         run: ./install_wxpdfdoc.sh
 
-      - name: Build Boost.Regex
-        if: matrix.autotools
-        run: |
-          # Define flags to avoid warnings in Boost code we don't care about.
-          boost_cxxflags="-Wno-deprecated-declarations -Wno-register -DBOOST_NO_AUTO_PTR -DBOOST_NO_STD_ALLOCATOR"
-          if [ "${{ matrix.compiler }}" = clang ]; then
-            boost_cxxflags="${boost_cxxflags} -Wno-parentheses-equality"
-          fi
-
-          for lib in regex; do
-            cd /opt/lmi/third_party/src/boost/libs/${lib}/src
-            echo "Compiling $lib sources"
-            ${CXX-${LMI_COMPILER}} -std=c++17 -fPIC $(echo ${boost_cxxflags}) -I../../.. -c *.cpp
-            echo "Creating libboost_${lib}.a from" *.o
-            ar rc /opt/lmi/local/${LMI_COMPILER}_${LMI_TRIPLET}/lib/libboost_${lib}.a *.o
-          done
-
       - name: Configure lmi
         if: matrix.autotools
         run: |
@@ -310,7 +293,7 @@ jobs:
           fi
 
       - name: Check concinnity and physical closure
-        if: matrix.autotools != true
+        if: matrix.mingw != true && matrix.autotools != true
         run: |
           # Somehow these files are executable and this triggers complaints
           # from check_script.sh, so avoid them by fixing permissions.

GNUmakefile

@@ -431,12 +431,23 @@ uninstall:
 
 # Custom tools built from source.
 
-TEST_CODING_RULES := $(build_dir)/test_coding_rules$(EXEEXT)
+# Always build host (i.e. Linux) version of this tool, as it depends on PCRE
+# library only available on POSIX systems and it is preferable to run it on
+# the host, rather than the target, system in any case.
+#
+# Note that this implies that the tool binary doesn't need to use EXEEXT and
+# that PERFORM should _not_ be used when running it.
+host_triplet     := x86_64-pc-linux-gnu
+host_exec_prefix := $(prefix)/$(LMI_COMPILER)_$(host_triplet)
+host_build_dir   := $(host_exec_prefix)/build/$(build_type)
+host_localbindir := $(prefix)/local/$(LMI_COMPILER)_$(host_triplet)/bin
+
+TEST_CODING_RULES := $(host_build_dir)/test_coding_rules
 
 .PHONY: custom_tools
 custom_tools:
-	@$(MAKE) test_coding_rules$(EXEEXT)
-	@$(INSTALL) -c -m 0775 $(TEST_CODING_RULES) $(localbindir)
+	@$(MAKE) LMI_TRIPLET=$(host_triplet) test_coding_rules
+	@$(INSTALL) -c -m 0775 $(TEST_CODING_RULES) $(host_localbindir)
 
 ################################################################################
 
@@ -501,7 +512,7 @@ check_concinnity: source_clean custom_tools
 	      || $(ECHO) "... in file $$z"; \
 	  done;
 	@$(ECHO) "  Miscellaneous problems:"
-	@-cd $(prefascicle_dir) && $(PERFORM) $(TEST_CODING_RULES) *
+	@cd $(prefascicle_dir) && $(TEST_CODING_RULES) *
 
 ################################################################################