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POGNU Make producing a totally different result
 

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  1. POGNU Make producing a totally different result
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    <p>This is confusing. I have my Makefile:</p> <pre><code>OBJECTS = INCLUDE_BUILD_PATH = /Users/wen/Projects/include # Change compilation settings here COMPILE = g++ override COMPILE_FLAGS += -O2 # Change linker/compiler specific settings here LD_FLAGS := CC_FLAGS := -c -I$(INCLUDE_BUILD_PATH)/bigint # Add source extensions here SRC_EXT = cpp cc # Add header dependencies here HEADERS = $(wildcard *.hpp) $(wildcard $(INCLUDE_BUILD_PATH)/*/*.hh) # Add source files here CC_FILES = $(wildcard *.cpp) $(wildcard $(INCLUDE_BUILD_PATH)/*/*.cc) CC_O_BUFFER = $(CC_FILES) CC_O_BUFFER := $(CC_O_BUFFER:.cpp=.o) CC_O_BUFFER := $(CC_O_BUFFER:.cc=.o) OBJECTS = $(CC_O_BUFFER) # Change .exe name here EXE_NAME = maketest # Link object files $(EXE_NAME): $(OBJECTS) $(COMPILE) $(COMPILE_FLAGS) $(LD_FLAGS) -o $@ $^ # Build source files define compile_rule %.o : %.$1 $$(COMPILE) $$(COMPILE_FLAGS) $$(CC_FLAGS) -o $$@ $$&lt; endef $(foreach EXT,$(SRC_EXT),$(eval $(call compile_rule,$(EXT)))) # Clean clean: rm -f $(OBJECTS) $(EXE_NAME) # Debug Build debug: @echo "Rerun with COMPILE_FLAGS=-D_DEBUG" # Print variables print: @echo $(CC_FILES) @echo $(OBJECTS) @echo $(HEADERS) </code></pre> <p>it compiled successfully at first, but then it stopped for no reason and this was the output:</p> <pre><code>Yoshi-Air:maketest wen$ make c++ -c -o maketest.o maketest.cpp maketest.cpp:4:10: fatal error: 'BigIntegerLibrary.hh' file not found #include "BigIntegerLibrary.hh" ^ 1 error generated. </code></pre> <p>the problem was, I didn't even tell it to use "c++" in the Makefile but "g++" instead. Also, when I cleared <code>CC_FLAGS</code> the <code>-c</code> was still there. It's like Make's having a mind of it's own.</p> <p>If I use <code>make print</code> to print out my variables it seems to be all right:</p> <pre><code>maketest.cpp /Users/wen/Projects/include/bigint/BigInteger.cc /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.cc /Users/wen/Projects/include/bigint/BigIntegerUtils.cc /Users/wen/Projects/include/bigint/BigUnsigned.cc /Users/wen/Projects/include/bigint/BigUnsignedInABase.cc maketest.o /Users/wen/Projects/include/bigint/BigInteger.o /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.o /Users/wen/Projects/include/bigint/BigIntegerUtils.o /Users/wen/Projects/include/bigint/BigUnsigned.o /Users/wen/Projects/include/bigint/BigUnsignedInABase.o maketest.hpp /Users/wen/Projects/include/bigint/BigInteger.hh /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.hh /Users/wen/Projects/include/bigint/BigIntegerLibrary.hh /Users/wen/Projects/include/bigint/BigIntegerUtils.hh /Users/wen/Projects/include/bigint/BigUnsigned.hh /Users/wen/Projects/include/bigint/BigUnsignedInABase.hh /Users/wen/Projects/include/bigint/NumberlikeArray.hh </code></pre> <p>Any help or advice will be appreciated. Thanks!</p> <h1>Update</h1> <p>I updated my <code>print</code> to print the expected execution of compile:</p> <pre><code>print: @echo $(CC_FILES) @echo $(OBJECTS) @echo $(HEADERS) @echo "Compiles with:" @echo $(COMPILE) $(COMPILE_FLAGS) $(LD_FLAGS) $(CC_FLAGS) </code></pre> <p>Result:</p> <pre><code>maketest.cpp /Users/wen/Projects/include/bigint/BigInteger.cc /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.cc /Users/wen/Projects/include/bigint/BigIntegerUtils.cc /Users/wen/Projects/include/bigint/BigUnsigned.cc /Users/wen/Projects/include/bigint/BigUnsignedInABase.cc maketest.o /Users/wen/Projects/include/bigint/BigInteger.o /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.o /Users/wen/Projects/include/bigint/BigIntegerUtils.o /Users/wen/Projects/include/bigint/BigUnsigned.o /Users/wen/Projects/include/bigint/BigUnsignedInABase.o maketest.hpp /Users/wen/Projects/include/bigint/BigInteger.hh /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.hh /Users/wen/Projects/include/bigint/BigIntegerLibrary.hh /Users/wen/Projects/include/bigint/BigIntegerUtils.hh /Users/wen/Projects/include/bigint/BigUnsigned.hh /Users/wen/Projects/include/bigint/BigUnsignedInABase.hh /Users/wen/Projects/include/bigint/NumberlikeArray.hh Yoshi-Air:maketest wen$ make print maketest.cpp /Users/wen/Projects/include/bigint/BigInteger.cc /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.cc /Users/wen/Projects/include/bigint/BigIntegerUtils.cc /Users/wen/Projects/include/bigint/BigUnsigned.cc /Users/wen/Projects/include/bigint/BigUnsignedInABase.cc maketest.o /Users/wen/Projects/include/bigint/BigInteger.o /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.o /Users/wen/Projects/include/bigint/BigIntegerUtils.o /Users/wen/Projects/include/bigint/BigUnsigned.o /Users/wen/Projects/include/bigint/BigUnsignedInABase.o maketest.hpp /Users/wen/Projects/include/bigint/BigInteger.hh /Users/wen/Projects/include/bigint/BigIntegerAlgorithms.hh /Users/wen/Projects/include/bigint/BigIntegerLibrary.hh /Users/wen/Projects/include/bigint/BigIntegerUtils.hh /Users/wen/Projects/include/bigint/BigUnsigned.hh /Users/wen/Projects/include/bigint/BigUnsignedInABase.hh /Users/wen/Projects/include/bigint/NumberlikeArray.hh Compiles with: g++ -O2 -c -I/Users/wen/Projects/include/bigint </code></pre> <p>That proves that make knows what I wanted, but when it builds it's completely different: <code>c++</code> instead of <code>g++</code>?!</p> <h1>Update 2:</h1> <p><code>c++</code> invokes clang, installed on my system.</p> <h1>Solution by Alex B:</h1> <blockquote> <p>But from the compilation command line it looks like Make is trying to use the implicit suffix rule, and ignores your pattern rule.</p> </blockquote> <p>I tried <code>.SUFFIXES:</code> and yes, it reported a no-rule found. Thanks, I will go and consult the manual.</p>
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    1. COMy advice? Check if `"BigIntegerLibrary.hh"` exists.
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    2. COThat has been told to me many times; it does exist. The problem is that make did not include CC_FLAGS properly to pass the include path to the compiler.
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    3. COOh. And so, let us see...
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