Report the compiler and version when building.

Useful when diagnosing CI systems.

.cirrus.yml

@@ -40,6 +40,7 @@ compile_template: &COMPILE
     else
       MAKE_OPTS=-e
     fi
+    make cc-version
     if test "x$DO_MAINTAINER_CHECKS" = "xyes"; then
       make maintainer-check
     fi

.github/workflows/windows-build.yml

@@ -30,6 +30,7 @@ jobs:
         export MSYSTEM=MINGW64
         autoreconf -i
         ./configure
+	make cc-version
         make -j6
     - name: Check Htslib
       shell: msys2 {0}

Makefile

@@ -113,8 +113,14 @@ BUILT_THRASH_PROGRAMS = \
 	test/thrash_threads6 \
 	test/thrash_threads7
 
-all: lib-static lib-shared $(BUILT_PROGRAMS) plugins $(BUILT_TEST_PROGRAMS) \
-     htslib_static.mk htslib-uninstalled.pc
+all: lib-static lib-shared $(BUILT_PROGRAMS) plugins \
+	$(BUILT_TEST_PROGRAMS) htslib_static.mk htslib-uninstalled.pc
+
+# Report compiler and version
+cc-version:
+	-@$(CC) --version  2>/dev/null || true
+	-@$(CC) --qversion 2>/dev/null || true
+	-@$(CC) -V         2>/dev/null || true
 
 ALL_CPPFLAGS = -I. $(CPPFLAGS)
 
@@ -996,3 +1002,4 @@ force:
 .PHONY: clean-dylib install-dylib
 .PHONY: test_htscodecs_rans4x8 test_htscodecs_rans4x16 test_htscodecs_arith
 .PHONY: test_htscodecs_tok3 test_htscodecs_fqzcomp test_htscodecs_varint
+.PHONY: cc-version