Merging upstream version 1.9.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/m4/pdns_enable_coverage.m4 b/m4/pdns_enable_coverage.m4
new file mode 100644
index 0000000..9e06468
--- /dev/null
+++ b/m4/pdns_enable_coverage.m4
@@ -0,0 +1,32 @@
+AC_DEFUN([PDNS_ENABLE_COVERAGE], [
+  AC_MSG_CHECKING([whether to enable code coverage])
+  AC_ARG_ENABLE([coverage],
+    AS_HELP_STRING([--enable-coverage],
+      [enable code coverage @<:@default=no@:>@]),
+    [enable_coverage=$enableval],
+    [enable_coverage=no]
+  )
+  AC_MSG_RESULT([$enable_coverage])
+
+  AS_IF([test "x$enable_coverage" = "xclang"], [
+    dnl let's see if the clang++ specific format is supported,
+    dnl as it has a much lower overhead and is more accurate,
+    dnl see https://clang.llvm.org/docs/SourceBasedCodeCoverage.html
+    gl_COMPILER_OPTION_IF([-fprofile-instr-generate -fcoverage-mapping], [
+      CFLAGS="$CFLAGS -DCOVERAGE -DCLANG_COVERAGE -fprofile-instr-generate -fcoverage-mapping"
+      CXXFLAGS="$CXXFLAGS -DCOVERAGE -DCLANG_COVERAGE -fprofile-instr-generate -fcoverage-mapping"
+    ], [
+      AC_MSG_ERROR([$CXX does not support gathering coverage data in the clang format])
+    ])
+   ])
+
+  AS_IF([test "x$enable_coverage" = "xyes"], [
+    gl_COMPILER_OPTION_IF([-fprofile-arcs -ftest-coverage], [
+      CFLAGS="$CFLAGS -DCOVERAGE --coverage"
+      CXXFLAGS="$CXXFLAGS -DCOVERAGE --coverage"
+      LDFLAGS="$LDFLAGS --coverage"
+    ], [
+      AC_MSG_ERROR([$CXX does not support gathering coverage data])
+    ])
+  ])
+])