tests: link against -lm

(see commit 4c7338c097)

app/config/Makefile.am

@@ -7,6 +7,11 @@ libgimpmath = $(top_builddir)/libgimpmath/libgimpmath-$(GIMP_API_VERSION).la
 libgimpmodule = $(top_builddir)/libgimpmodule/libgimpmodule-$(GIMP_API_VERSION).la
 libgimpthumb = $(top_builddir)/libgimpthumb/libgimpthumb-$(GIMP_API_VERSION).la
 
+if OS_WIN32
+else
+libm = -lm
+endif
+
 AM_CPPFLAGS = \
 	-DG_LOG_DOMAIN=\"Gimp-Config\"				\
 	-DGIMP_APP_VERSION_STRING=\"$(GIMP_APP_VERSION)\"	\
@@ -119,7 +124,8 @@ test_config_LDADD = \
 	$(GEXIV2_LIBS)				\
 	$(Z_LIBS)				\
 	$(JSON_C_LIBS)				\
-	$(LIBMYPAINTGEGL_LIBS)
+	$(LIBMYPAINTGEGL_LIBS)		\
+	$(libm)
 
 CLEANFILES = $(EXTRA_PROGRAMS) foorc
 

app/operations/tests/Makefile.am

@@ -13,6 +13,11 @@ libgimpmodule = $(top_builddir)/libgimpmodule/libgimpmodule-$(GIMP_API_VERSION).
 libgimpwidgets = $(top_builddir)/libgimpwidgets/libgimpwidgets-$(GIMP_API_VERSION).la
 libgimpthumb = $(top_builddir)/libgimpthumb/libgimpthumb-$(GIMP_API_VERSION).la
 
+if OS_WIN32
+else
+libm = -lm
+endif
+
 AM_CPPFLAGS = \
 	-I$(top_srcdir)		\
 	-I$(top_srcdir)/app	\
@@ -57,7 +62,8 @@ LDADD = \
 	$(GDK_PIXBUF_LIBS)					\
 	$(PANGOCAIRO_LIBS)					\
 	$(GEGL_LIBS)						\
-	$(GLIB_LIBS)						
+	$(GLIB_LIBS)						\
+	$(libm)
 
 output-dir:
 	mkdir -p output

app/tests/Makefile.am

@@ -50,6 +50,11 @@ libgimpmodule = $(top_builddir)/libgimpmodule/libgimpmodule-$(GIMP_API_VERSION).
 libgimpwidgets = $(top_builddir)/libgimpwidgets/libgimpwidgets-$(GIMP_API_VERSION).la
 libgimpthumb = $(top_builddir)/libgimpthumb/libgimpthumb-$(GIMP_API_VERSION).la
 
+if OS_WIN32
+else
+libm = -lm
+endif
+
 AM_CPPFLAGS = \
 	-I$(top_srcdir)		\
 	-I$(top_srcdir)/app	\
@@ -132,7 +137,8 @@ LDADD = \
 	$(JSON_C_LIBS)						\
 	$(LIBMYPAINTGEGL_LIBS)					\
 	$(INTLLIBS)						\
-	$(RT_LIBS)
+	$(RT_LIBS)							\
+	$(libm)
 
 gimpdir-output:
 	mkdir -p gimpdir-output