I searched on the inet but I did not find any clear answer. Could you point me in the right direction on how to convert a Makefile into a CMakeLists?
I want to do that because I am new both to makefile and to cmake. In my job CMake is more used and since I need to start using one of them I prefer having everything in CMake. I know CMake is generating a Makefile but for me CMake is way easier to read than a Makefile.
I have the following Makefile:
PREFIX ?= /usr/local
CC = gcc
AR = ar
CFLAGS = -std=gnu99 -fPIC -Wall -Wno-unused-parameter -Wno-unused-function -I. -O4
APRILTAG_SRCS := $(shell ls *.c common/*.c)
APRILTAG_HEADERS := $(shell ls *.h common/*.h)
APRILTAG_OBJS := $(APRILTAG_SRCS:%.c=%.o)
TARGETS := libapriltag.a libapriltag.so
# LIBS := -Lusr/include/flycapture
.PHONY: all
all: $(TARGETS)
@$(MAKE) -C example all
.PHONY: install
install: libapriltag.so
@chmod +x install.sh
@./install.sh $(PREFIX)/lib libapriltag.so #this should be the line that install the library
@./install.sh $(PREFIX)/include/apriltag $(APRILTAG_HEADERS)
@sed 's:^prefix=$$:prefix=$(PREFIX):' < apriltag.pc.in > apriltag.pc
@./install.sh $(PREFIX)/lib/pkgconfig apriltag.pc
@rm apriltag.pc
@ldconfig
libapriltag.a: $(APRILTAG_OBJS)
@echo " [$@]"
@$(AR) -cq $@ $(APRILTAG_OBJS)
libapriltag.so: $(APRILTAG_OBJS)
@echo " [$@]"
@$(CC) -fPIC -shared -o $@ $^
%.o: %.c
@echo " $@"
@$(CC) -o $@ -c $< $(CFLAGS)
.PHONY: clean
clean:
@rm -rf *.o common/*.o $(TARGETS)
@$(MAKE) -C example clean
I am not asking you to do my job but I would like to have some kind of guide or a good link where to look.
The project contains both C and C++ programming languages.
I started creating a new CMakeLists.txt file, but it is still not working. It gives me the following errors: You have called ADD_LIBRARY for library librapriltag.a without any source files. This typically indicates a problem with your CMakeLists.txt file
-- Configuring done
CMake Error: Cannot determine link language for target "librapriltag.a".
CMake Error: CMake can not determine linker language for target: librapriltag.a
-- Generating done
-- Build files have been written to: .....
The CMakeLists.txt I started creating is the following:
project( apriltag2 C CXX)
cmake_minimum_required(VERSION 2.8)
set(CMAKE_C_FLAGS "-std=gnu99 -fPIC -Wall -Wno-unused-parameter -Wno-unused-function -I. -O4")
include_directories("/home/fschiano/Repositories/apriltag2")
include_directories("/home/fschiano/Repositories/apriltag2/common")
add_library( librapriltag.a )
The CMakeLists.txt which works is the following:
project( apriltag2 )
cmake_minimum_required(VERSION 2.8)
set(CMAKE_C_FLAGS "-std=gnu99 -fPIC -Wall -Wno-unused-parameter -Wno-unused-function -I. -O4")
message("CMAKE_SOURCE_DIR=${CMAKE_SOURCE_DIR}")
file(GLOB apriltag_SRC "*.c")
file(GLOB apriltag_HEADERS "*.h")
set(APRILTAG_SRCS ${apriltag_SRC})
set(APRILTAG_HEADERS ${apriltag_HEADERS})
message(STATUS "CMAKE_CURRENT_LIST_DIR=${CMAKE_CURRENT_LIST_DIR}")
add_library(apriltag STATIC ${APRILTAG_SRCS})
target_include_directories(apriltag PUBLIC ${CMAKE_SOURCE_DIR})
target_compile_options(apriltag PUBLIC -fPIC -Wall -Wno-unused-parameter -Wno-unused-function -O4)
install(TARGETS apriltag
ARCHIVE DESTINATION lib
RUNTIME DESTINATION bin
LIBRARY DESTINATION lib)
install(DIRECTORY CMAKE_CURRENT_LIST_DIR/include/
DESTINATION CMAKE_CURRENT_LIST_DIR/include/
FILES_MATCHING PATTERN *.h)
EDIT:
Something is still not right. If I want to change something in my library, like something which is in /home/fschiano/Repositories/apriltag2/common
If I use the Makefile which I had before doing all these modifications and I do:
make
do some modifications in the files I wanted to modify
sudo make install, which would give me the following output:
/usr/local/lib/libapriltag.so /usr/local/include/apriltag/apriltag.h /usr/local/include/apriltag/common/g2d.h /usr/local/include/apriltag/common/getopt.h /usr/local/include/apriltag/common/homography.h /usr/local/include/apriltag/common/image_f32.h /usr/local/include/apriltag/common/image_u8.h /usr/local/include/apriltag/common/image_u8x3.h /usr/local/include/apriltag/common/matd.h /usr/local/include/apriltag/common/math_util.h /usr/local/include/apriltag/common/pnm.h /usr/local/include/apriltag/common/postscript_utils.h /usr/local/include/apriltag/common/string_util.h /usr/local/include/apriltag/common/svd22.h /usr/local/include/apriltag/common/thash_impl.h /usr/local/include/apriltag/common/timeprofile.h /usr/local/include/apriltag/common/time_util.h /usr/local/include/apriltag/common/unionfind.h /usr/local/include/apriltag/common/workerpool.h /usr/local/include/apriltag/common/zarray.h /usr/local/include/apriltag/common/zhash.h /usr/local/include/apriltag/common/zmaxheap.h /usr/local/include/apriltag/tag16h5.h /usr/local/include/apriltag/tag25h7.h /usr/local/include/apriltag/tag25h9.h /usr/local/include/apriltag/tag36artoolkit.h /usr/local/include/apriltag/tag36h10.h /usr/local/include/apriltag/tag36h11.h /usr/local/lib/pkgconfig/apriltag.pc /sbin/ldconfig.real: /usr/lib/libstdc++.so.5 is not a symbolic link
and the modifications would take effect.
Now, if I remove the Makefile and I do:
cmake .
make
do some modifications in the files I wanted to modify
sudo make install, it gives me the following output:
Install the project... -- Install configuration: "" -- Up-to-date: /usr/local/lib/libapriltag.a
So it seems that the install part of the CMakeLists.txt is not right!
The file install.sh is the following.
#!/bin/sh -e
# Usage: install.sh TARGET [RELATIVE PATHS ...]
#
# e.g. ./install.sh /usr/local foo/file1 foo/file2 ...
# This creates the files /usr/local/foo/file1 and /usr/local/foo/file2
TARGETDIR=$1
shift
for src in "$@"; do
dest=$TARGETDIR/$src
mkdir -p $(dirname $dest)
cp $src $dest
echo $dest
done
Could you try to help me? Thanks
