## src/Makefile

# Makefile for top dir

export OBJDIR = $(dir $(realpath $(lastword $(MAKEFILE_LIST))))/objdir_tmp

# $(call version_number,1.2.3)

# major.minor.patch

# libtool manual 4.2: -version-number

define version_number

? $(MAKE) -C $@ soname=lib$@.so.$(word 1,$(subst ., ,$(1)))

? cp $(OBJDIR)/$@/$@ $(OBJDIR)/$@/lib$@.so.$(1)

? cd $(OBJDIR)/$@; ln -f -s $(OBJDIR)/$@/lib$@.so.$(1) $(OBJDIR)/$@/lib$@.so.$(word 1,$(subst ., ,$(1))); cd ..

? cd $(OBJDIR)/$@; ln -f -s $(OBJDIR)/$@/lib$@.so.$(1) $(OBJDIR)/$@/lib$@.so; cd ..

endef

SUBDIRS = main foo

all : $(SUBDIRS)

install : $(SUBDIRS)

main : foo

main : ; $(MAKE) -C $@

foo : ; $(call version_number,6.2.3)

# make DESTDIR=~/foo install

install :

? install -d "$(DESTDIR)/usr/local/bin"

? install -d "$(DESTDIR)/usr/local/lib"

? install -m 0755 $(OBJDIR)/main/main "$(DESTDIR)/usr/local/bin"

? install -m 0755 $(OBJDIR)/foo/*.so* "$(DESTDIR)/usr/local/lib"

clean : ; -rm -fr $(OBJDIR)

.PHONY : $(SUBDIRS) all install clean

---

## src/main/Makefile

# Makefile for subdir

# build shared library with -fPIC, -shared

CFLAGS ? ?= # -g -O3 -fPIC # CXXFLAGS for .cpp

CPPFLAGS ?= -MMD -MP -I../foo

LDFLAGS ? = -L$(OBJDIR)/foo # -shared

LDLIBS ? ?= -lfoo

#CC ? ? ? = $(CXX) # link with CXX for .cpp

LDFLAGS ?+= -Wl,-rpath,$(OBJDIR)/foo

LDFLAGS ?+= -Wl,-rpath,'$$ORIGIN/../lib'

#LDFLAGS += -Wl,-soname,$(soname)

# make # NDEBUG=1

ifdef NDEBUG

CPPFLAGS += -DNDEBUG

CFLAGS ? += -O3 # .cpp

else

CFLAGS ? += -g # .cpp

LDFLAGS ?+= -fsanitize=address

endif

all : $(OBJDIR)/main/main # foo

$(OBJDIR)/main/main : $(OBJDIR)/main/$(patsubst %.c,%.o,$(wildcard *.c))

? $(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@ ?# CXX for .cpp

$(OBJDIR)/main/%.o : %.c | $(OBJDIR)/main

? $(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $< ?# CXX CXXFLAGS for .cpp

$(OBJDIR)/main: ; mkdir -p $(OBJDIR)/main

-include $(OBJDIR)/main/*.d

clean : ; -rm -fr $(OBJDIR)

.PHONY : all clean

---

## src/foo/Makefile

# Makefile for subdir

# build shared library with -fPIC, -shared

CFLAGS ? ?= -fPIC # -g -O3 # CXXFLAGS for .cpp

CPPFLAGS ?= -MMD -MP # -I../bar

LDFLAGS ? = -shared # -L../bar

LDLIBS ? ?= # -lbar

#CC ? ? ? = $(CXX) # link with CXX for .cpp

LDFLAGS ?+= -Wl,-rpath,'$$ORIGIN/../bar'

LDFLAGS ?+= -Wl,-rpath,'$$ORIGIN/../lib'

LDFLAGS ?+= -Wl,-soname,$(soname)

# make # NDEBUG=1

ifdef NDEBUG

CPPFLAGS += -DNDEBUG

CFLAGS ? += -O3 # .cpp

else

CFLAGS ? += -g # .cpp

LDFLAGS ?+= -fsanitize=address

endif

all : $(OBJDIR)/foo/foo # foo

$(OBJDIR)/foo/foo : $(OBJDIR)/foo/$(patsubst %.c,%.o,$(wildcard *.c))

? $(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@ ?# CXX for .cpp

$(OBJDIR)/foo/%.o : %.c | $(OBJDIR)/foo

? $(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $< ?# CXX CXXFLAGS for .cpp

$(OBJDIR)/foo: ; mkdir -p $(OBJDIR)/foo

-include $(OBJDIR)/foo/*.d

clean : ; -rm -fr $(OBJDIR)

.PHONY : all clean

---

// main.c

#include <stdio.h>

#include <sanitizer/lsan_interface.h>

#include <signal.h>

#include <assert.h>

#include "foo.h"

void handlerCont(int signum) {

? printf("SIGCONT %d\n", signum);

#ifndef NDEBUG

? __lsan_do_recoverable_leak_check();

#endif

}

int main() {

? signal(SIGCONT, handlerCont); // kill -CONT 123 # pid

? printf("main\n");

? foo();

? int a[1024];

? int n = 10240;

? // a[n] = 1; //asan

? // assert(0);

}