# Makefile for top dir

# $(call makever,1.2.3)

# major.minor.patch

# libtool manual: -version-number

define makever

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

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

? @ cd $(OBJDIR)/$@ ; \

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

? ? cd - >/dev/null 2>&1 ;

? @ cd $(OBJDIR)/$@ ; \

? ? ln -f -s lib$@.so.$(1) lib$@.so ; \

? ? cd - >/dev/null 2>&1 ;

endef

# make # BUILD_DIR=build

ifdef BUILD_DIR

export OBJDIR = $(abspath $(BUILD_DIR))

else

export OBJDIR = $(abspath build)

endif

SUBDIRS = main foo

all : $(SUBDIRS)

install : $(SUBDIRS)

$(SUBDIRS) : | $(OBJDIR)

$(OBJDIR) : ; @ mkdir $@

main : foo

main : ; @ $(MAKE) -C $@

foo : ; $(call makever,1.2.3)

# make DESTDIR=~/foo install

# Alexandre Duret-Lutz's Autotools Tutorial (without animations):

# "is ready to be uncompressed in / on many hosts"

install :

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

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

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

? cp -P $(OBJDIR)/foo/*.so* $(DESTDIR)/usr/local/lib

clean :

? @ for dir in $(SUBDIRS); do \

? ? $(MAKE) -C $$dir $@; \

? done

? -rm -fr $(OBJDIR)

.PHONY : $(SUBDIRS) all install clean

---

# 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,'$$ORIGIN/../foo'

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

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

# make # NDEBUG=1

ifdef NDEBUG

CFLAGS ? += -O3 # .cpp

CPPFLAGS += -DNDEBUG

else

CFLAGS ? += -g # .cpp

LDFLAGS ?+= -fsanitize=address

endif

SUBDIR ? ?= $(OBJDIR)/$(lastword $(subst /, ,$(CURDIR)))

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

# https://make.mad-scientist.net/papers/how-not-to-use-vpath/

$(SUBDIR)/main : $(addprefix $(SUBDIR)/,$(patsubst %.c,%.o,$(wildcard *.c))) # .cpp

? $(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@

$(SUBDIR)/%.o : %.c | $(SUBDIR) # .cpp

? $(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<

$(SUBDIR) : ; @ mkdir $@

-include $(SUBDIR)/*.d

clean : ; -rm -fr $(SUBDIR)

.PHONY : all clean

---

# Makefile for subdir

# build shared library with -fPIC, -shared

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

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

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

CFLAGS ? += -O3 # .cpp

CPPFLAGS += -DNDEBUG

else

CFLAGS ? += -g # .cpp

LDFLAGS ?+= -fsanitize=address

endif

SUBDIR ? ?= $(OBJDIR)/$(lastword $(subst /, ,$(CURDIR)))

all : $(SUBDIR)/foo # $(SUBDIR)/bar

# https://make.mad-scientist.net/papers/how-not-to-use-vpath/

$(SUBDIR)/foo : $(addprefix $(SUBDIR)/,$(patsubst %.c,%.o,$(wildcard *.c))) # .cpp

? $(CC) $(LDFLAGS) $^ $(LDLIBS) -o $@

$(SUBDIR)/%.o : %.c | $(SUBDIR) # .cpp

? $(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<

$(SUBDIR) : ; @ mkdir $@

-include $(SUBDIR)/*.d

clean : ; -rm -fr $(SUBDIR)

.PHONY : all clean

---

#include <stdio.h>

#include <signal.h>

#include <assert.h>

#ifndef NDEBUG

#include <sanitizer/lsan_interface.h>

#endif

#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); // -DNDEBUG

}