static linking on os x

.travis.yml

@@ -10,18 +10,14 @@ env:
   - secure: J1ta2/K8lj5dbHRvk+jTUAMICSnepfyc8ILCfM/HFCRaXMJQJTX1HDzEMwK3tAzzKaKEp9Tbm2b3IwE1tCtFaAfYUGozmHLirkFfKqCu/jNUkxL807M8NiqMx+H7tu2aR6t9opYyBjNhtuthbIdir3c42nldYdpse0ZLhzQTLfs=
 
 before_install:
-  - brew tap homebrew/science
-  - brew install htslib
+  - brew install ldc
   - git submodule update --init --recursive
-  - wget https://dl.dropboxusercontent.com/u/7916095/ldc2-0.13.0-osx-x86_64.tar.bz2
-  - tar xjf ldc2-0.13.0-osx-x86_64.tar.bz2
-  - export PATH=ldc2-0.13.0-osx-x86_64/bin:$PATH
   - wget https://github.com/craigcitro/r-travis/raw/master/scripts/dropbox.sh
   - chmod +x dropbox.sh
   - curl -L "https://dl.dropboxusercontent.com/u/7916095/shunit2-2.0.3.tgz" | tar zx
 
 script:
-  - make sambamba-ldmd2-64-osx
+  - make sambamba-ldmd2-64
   - ./.run_tests.sh
 
 after_success:

Makefile

@@ -5,30 +5,37 @@ HTSLIB_PATH=-Lhtslib
 HTSLIB_SUBCMD=$(HTSLIB_PATH) -Wl,-Bstatic -lhts -Wl,-Bdynamic
 RDMD_FLAGS=--force --build-only --compiler=$(D_COMPILER) $(D_FLAGS)
 
+# Linux & DMD only - this goal is used because of fast compilation speed, during development
 all: htslib-static
 	mkdir -p build/
 	rdmd --force --build-only $(D_FLAGS) -c -ofbuild/sambamba.o main.d
 	gcc -Wl,--gc-sections -o build/sambamba build/sambamba.o $(HTSLIB_SUBCMD) -l:libphobos2.a -lrt -lpthread -lm
 
+PLATFORM := $(shell uname -s)
+
+ifeq "$(PLATFORM)" "Darwin"
+LINK_CMD=gcc -dead_strip -lphobos2-ldc -ldruntime-ldc -lm -lpthread htslib/libhts.a build/sambamba.o -o build/sambamba
+else
+LINK_CMD=gcc -Wl,--gc-sections -o build/sambamba build/sambamba.o $(HTSLIB_SUBCMD) -l:libphobos2-ldc.a -l:libdruntime-ldc.a  -lrt -lpthread -lm
+endif
+
+# This is the main Makefile goal, used for building releases (best performance)
 sambamba-ldmd2-64: htslib-static
 	mkdir -p build/
 	ldmd2 @sambamba-ldmd-release.rsp
-	gcc -Wl,--gc-sections -o build/sambamba build/sambamba.o $(HTSLIB_SUBCMD) -l:libphobos2-ldc.a -l:libdruntime-ldc.a  -lrt -lpthread -lm
+	$(LINK_CMD)
 
+# For debugging; GDB & Valgrind are more friendly to executables created using LDC/GDC than DMD
 sambamba-ldmd2-debug: htslib-static
 	mkdir -p build/
 	ldmd2 @sambamba-ldmd-debug.rsp
-	gcc -Wl,--gc-sections -o build/sambamba build/sambamba.o $(HTSLIB_SUBCMD) -l:libphobos2-ldc.a -l:libdruntime-ldc.a  -lrt -lpthread -lm
+	$(LINK_CMD)
 
 htslib-static:
 	cd htslib && $(MAKE)
 
 # all below link to libhts dynamically for simplicity
 
-sambamba-ldmd2-64-osx:
-	mkdir -p build/
-	rdmd --force --build-only --compiler=ldmd2 -IBioD -O -L-lhts -release -inline -noboundscheck -ofbuild/sambamba main.d
-
 sambamba-flagstat:
 	mkdir -p build/
 	rdmd $(RDMD_FLAGS) -L-lhts -version=standalone -ofbuild/sambamba-flagstat sambamba/flagstat.d

README.md

@@ -51,17 +51,11 @@ which targets LLVM.
 
 ## Compiling for Mac OS X
 
-(The Dropbox archive differs from the official LDC release in that it also contains `rdmd` executable from DMD distribution.)
-
 ```sh
-    brew tap homebrew/science
-    brew install htslib
-    wget https://dl.dropboxusercontent.com/u/7916095/ldc2-0.13.0-osx-x86_64.tar.bz2
-    tar xjf ldc2-0.13.0-osx-x86_64.tar.bz2
+    brew install ldc
     git clone --recursive https://github.com/lomereiter/sambamba.git
     cd sambamba
-    export PATH=../ldc2-0.13.0-osx-x86_64/bin:$PATH
-    make sambamba-ldmd2-64-osx
+    make sambamba-ldmd2-64
 ```
 
 ## Compiling for Linux using Docker