Add minor improvements in Makefile

Author: mgreter

.travis.yml

@@ -33,6 +33,8 @@ matrix:
       env: AUTOTOOLS=yes COVERAGE=yes BUILD=static
     - os: osx
       compiler: gcc
+    - os: osx
+      env: AUTOTOOLS=no COVERAGE=yes BUILD=static
 
 script: ./script/ci-build-libsass
 before_install: ./script/ci-install-deps

Makefile

@@ -4,9 +4,15 @@ RM       ?= rm -f
 CP       ?= cp -a
 MKDIR    ?= mkdir
 WINDRES  ?= windres
-CFLAGS   ?= -Wall -O2
-CXXFLAGS ?= -Wall -O2
-LDFLAGS  ?= -Wall -O2 -Wl,--no-undefined
+CFLAGS   ?= -Wall
+CXXFLAGS ?= -Wall
+LDFLAGS  ?= -Wall
+ifneq "$(COVERAGE)" "yes"
+  CFLAGS   += -O2
+  CXXFLAGS += -O2
+  LDFLAGS  += -O2
+endif
+LDFLAGS  += -Wl,-undefined,error
 CAT      ?= $(if $(filter $(OS),Windows_NT),type,cat)
 
 ifneq (,$(findstring /cygdrive/,$(PATH)))

script/ci-build-libsass

@@ -14,9 +14,9 @@ if [ "x$SASS_SPEC_PATH" == "x" ]; then export SASS_SPEC_PATH=$(pwd)/sass-spec; f
 
 if [ "x$COVERAGE" == "xyes" ]; then
   COVERAGE_OPT="--enable-coverage"
-  export EXTRA_CFLAGS="-O0 --coverage"
-  export EXTRA_CXXFLAGS="-O0 --coverage"
-  export EXTRA_LDFLAGS="-O0 --coverage"
+  export EXTRA_CFLAGS="--coverage"
+  export EXTRA_CXXFLAGS="--coverage"
+  export EXTRA_LDFLAGS="--coverage"
 else
   COVERAGE_OPT="--disable-coverage"
 fi