[gspell] Add code coverage support for unit tests

[Sébastien Wilmet <swilmet src gnome org>]

commit b71a52018c760b32539753253d5f736e809f1c57
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Mar 9 10:58:14 2016 +0100

    Add code coverage support for unit tests
    
    Having green colors should be a good motivation to write more unit
    tests. Let's see if it works.

 Makefile.am           |    3 +++
 configure.ac          |    5 +++++
 gspell/Makefile.am    |   23 +++++++++++++++++------
 testsuite/Makefile.am |    2 ++
 4 files changed, 27 insertions(+), 6 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index a998a5b..9926b37 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -23,6 +23,7 @@ MAINTAINERCLEANFILES = \
        m4/ax_append_link_flags.m4 \
        m4/ax_check_compile_flag.m4 \
        m4/ax_check_link_flag.m4 \
+       m4/ax_code_coverage.m4 \
        m4/ax_compiler_flags_cflags.m4 \
        m4/ax_compiler_flags_gir.m4 \
        m4/ax_compiler_flags_ldflags.m4 \
@@ -76,4 +77,6 @@ MAINTAINERCLEANFILES = \
 
 DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc
 
+ CODE_COVERAGE_RULES@
+
 -include $(top_srcdir)/git.mk
diff --git a/configure.ac b/configure.ac
index 90f19e3..3e25a92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -127,6 +127,10 @@ GOBJECT_INTROSPECTION_CHECK([1.42.0])
 AX_REQUIRE_DEFINED([VAPIGEN_CHECK])
 VAPIGEN_CHECK
 
+# Code coverage for unit tests
+AX_REQUIRE_DEFINED([AX_CODE_COVERAGE])
+AX_CODE_COVERAGE()
+
 # check for osx platform
 AC_MSG_CHECKING([for Mac OS X platform])
 case "$host" in
@@ -199,4 +203,5 @@ Configuration:
        Compiler:               ${CC}
        GObject introspection:  ${found_introspection}
        Vala:                   ${enable_vala}
+       Code coverage:          ${enable_code_coverage}
 "
diff --git a/gspell/Makefile.am b/gspell/Makefile.am
index 80aba68..efbdeed 100644
--- a/gspell/Makefile.am
+++ b/gspell/Makefile.am
@@ -1,5 +1,7 @@
 SUBDIRS = resources
 
+ CODE_COVERAGE_RULES@
+
 AM_CPPFLAGS =                          \
        -DDATADIR=\""$(datadir)"\"      \
        -DG_LOG_DOMAIN=\"gspell\"       \
@@ -7,11 +9,10 @@ AM_CPPFLAGS =                         \
        -I$(top_builddir)               \
        -I$(top_srcdir)                 \
        $(WARN_CFLAGS)                  \
+       $(CODE_COVERAGE_CPPFLAGS)       \
        $(DEP_CFLAGS)                   \
        $(GTK_MAC_CFLAGS)
 
-AM_LDFLAGS = $(WARN_LDFLAGS)
-
 BUILT_SOURCES =                        \
        gspell-resources.c
 
@@ -70,8 +71,13 @@ libgspell_core_la_SOURCES =          \
 nodist_libgspell_core_la_SOURCES = \
        $(BUILT_SOURCES)
 
-libgspell_core_la_LDFLAGS = \
-       -no-undefined
+libgspell_core_la_CFLAGS = \
+       $(CODE_COVERAGE_CFLAGS)
+
+libgspell_core_la_LDFLAGS =            \
+       -no-undefined                   \
+       $(WARN_LDFLAGS)                 \
+       $(CODE_COVERAGE_LDFLAGS)
 
 # The real library.
 lib_LTLIBRARIES = libgspell-1.la
@@ -83,10 +89,15 @@ libgspell_1_la_LIBADD =             \
        $(DEP_LIBS)             \
        $(GTK_MAC_LIBS)
 
+libgspell_1_la_CFLAGS = \
+       $(CODE_COVERAGE_CFLAGS)
+
 libgspell_1_la_LDFLAGS =                       \
        -version-info $(GSPELL_LT_VERSION)      \
        -no-undefined                           \
-       -export-symbols-regex "^gspell_.*"
+       -export-symbols-regex "^gspell_.*"      \
+       $(WARN_LDFLAGS)                         \
+       $(CODE_COVERAGE_LDFLAGS)
 
 libgspell_1_includedir = $(includedir)/gspell-1/gspell
 libgspell_1_include_HEADERS = $(gspell_public_headers)
@@ -101,7 +112,7 @@ if OS_OSX
 libgspell_1_la_LDFLAGS += \
        -framework Cocoa
 
-libgspell_1_la_CFLAGS = \
+libgspell_1_la_CFLAGS += \
        -xobjective-c
 
 gspell_private_headers += \
diff --git a/testsuite/Makefile.am b/testsuite/Makefile.am
index 8f3b34d..06a56d4 100644
--- a/testsuite/Makefile.am
+++ b/testsuite/Makefile.am
@@ -1,3 +1,5 @@
+ CODE_COVERAGE_RULES@
+
 AM_CPPFLAGS =                  \
        -I$(top_srcdir)         \
        $(WARN_CFLAGS)          \