From the description of https://stackoverflow.com/a/2531841/5983841 and https://stackoverflow.com/a/26832773/5983841 , my understanding is that Makefile.am is not needed in the dist tarball.
I tried
wget https://dist.libuv.org/dist/v1.44.2/libuv-v1.44.2-dist.tar.gz
tar xf libuv-v1.44.2-dist.tar.gz
cd libuv-1.44.2/
mv Makefile.am Makefile.am.bak
./configure
make
it gives error when running make:
tian#tian-B250M-Wind:~/Desktop/playground/garage/libuv-1.44.2$ make
make: *** No rule to make target 'Makefile.am', needed by 'Makefile.in'. Stop.
I answered there: autotools are intended to be used with free software. A dist tarball for a free software project should include all the files needed for someone to be able to make changes to the project and rebuild it, as they want to: that's the foundational goal of Free Software.
They can't do that if you omit critical build files, like Makefile.am. If they wanted to add a new file or something to the project, they need the Makefile.am to modify it. So it should be included in the dist tarball.
Saying that the file is not required in order to build the software as-is without modification, is not the same thing as saying that it can be omitted.
In this specific case, automake-generated makefiles contain rules to check whether someone modified the Makefile.am file and if so, the rules will re-run automake to ensure everything is up to date and correct so you don't have to remember to do it by hand. However this of course requires that the Makefile.am file be present so make can determine that it's up to date.
Related
Trying to follow this tutorial I have done my own "Hello World" in c++.
This is the code prueba.cpp:
#include <iostream>
int main()
{
std::cout<<"Hola Mundo"<<std::endl;
return 0;
}
Then, I have created configure.ac file with this information:
AC_INIT([holamundo], [0.1], [address#address.com])
AM_INIT_AUTOMAKE
AC_PROG_CC
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
and Makefile.am
AUTOMAKE_OPTIONS = foreign
bin_PROGRAMS = holamundo
holamundo_SOURCES = ./prueba.cpp
Those files are in the same folder of prueba.cpp
Finnally, in console and in the same folder of prueba.cpp I run the commands:
aclocal (no errors)
autoconf (no errors)
automake --add-missing Then I have the next errors:
Makefile.am:3: warning: source file './prueba.cpp' is in a subdirectory,
Makefile.am:3: but option 'subdir-objects' is disabled
automake: warning: possible forward-incompatibility.
automake: At least one source file is in a subdirectory, but the 'subdir-objects'
automake: automake option hasn't been enabled. For now, the corresponding output
automake: object file(s) will be placed in the top-level directory. However, this
automake: behavior may change in a future Automake major version, with object
automake: files being placed in the same subdirectory as the corresponding sources.
automake: You are advised to start using 'subdir-objects' option throughout your
automake: project, to avoid future incompatibilities.
/usr/share/automake-1.16/am/depend2.am: error: am__fastdepCXX does not appear in AM_CONDITIONAL
/usr/share/automake-1.16/am/depend2.am: The usual way to define 'am__fastdepCXX' is to add 'AC_PROG_CXX'
/usr/share/automake-1.16/am/depend2.am: to 'configure.ac' and run 'aclocal' and 'autoconf' again
Makefile.am: error: C++ source seen but 'CXX' is undefined
Makefile.am: The usual way to define 'CXX' is to add 'AC_PROG_CXX'
Makefile.am: to 'configure.ac' and run 'autoconf' again.
Issue 1
Makefile.am:3: warning: source file './prueba.cpp' is in a subdirectory,
Makefile.am:3: but option 'subdir-objects' is disabled
automake: warning: possible forward-incompatibility.
[...]
Do not prefix source names with ./ (or ../) in Makefile.am.
Automake can handle sources and targets in bona fide subdirectories, with or without recursive make, but you do need to set up your project for that, and I would not go there until you have a better handle on Autotools basics.
Issue 2
Makefile.am: error: C++ source seen but 'CXX' is undefined
Makefile.am: The usual way to define 'CXX' is to add 'AC_PROG_CXX'
Makefile.am: to 'configure.ac' and run 'autoconf' again.
The diagnostic already explains the problem and the solution, but see also below.
Issue 3
/usr/share/automake-1.16/am/depend2.am: error: am__fastdepCXX does not appear in AM_CONDITIONAL
/usr/share/automake-1.16/am/depend2.am: The usual way to define 'am__fastdepCXX' is to add 'AC_PROG_CXX'
/usr/share/automake-1.16/am/depend2.am: to 'configure.ac' and run 'aclocal' and 'autoconf' again
Again, the diagnostic already describes a solution. Since it is the same solution that another diagnostic suggests, and that seems plausible and appropriate, that seems to be a pretty good bet. Specifically:
configure.ac
AC_INIT([holamundo], [0.1], [address#address.com])
AM_INIT_AUTOMAKE
AC_PROG_CC
# Configure the C++ compiler:
AC_PROG_CXX
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
Issue 4
Finnally, in console and in the same folder of prueba.cpp I run the commands:
Generally speaking, you should not manually run the individual autotools (autoconf, automake, etc.). Instead, use autoreconf, which will identify which of the (other) autotools need to be run, and will run them in the correct order. Among the command-line options it supports are -i / --install and -f / --force, which will provide for installing the local autotool components in the source tree. You should probably run autoreconf --install --force once in your source tree. After that, you should need only plain autoreconf, unless you change to a different version of the autotools or modify one of the local autotool components.
I don't have much experience with makefiles, but I am trying to compile and run the program "hdf5ToMds.c" found on this Github repository: https://github.com/MDSplus/mdsplus/tree/alpha/hdf5
My steps towards using the Makefile.in in the folder were as follows:
autoscan
mv configure.scan configure.ac
aclocal
autoheader
autoconf
./configure
make
Now when I run the make I get the error:
Makefile:1: Makefile.inc: No such file or directory
make: *** No rule to make target 'Makefile.inc'. Stop.
Am I missing something obvious? I'm not very familiar with this whole process of getting the code from Github and having to make it. I do have the entire repository cloned, just in case that's relevant.
I am trying to build an xsreensaver module using the makefile. I downloaded the source from http://www.jwz.org/xscreensaver/, and read the hacking readme.
As my screensaver involves opengl and reading of images, I'm trying to compile the 'photopile' screensaver.
I've run the following
$ cd xscreensaver-5.29
$ cd hacks
$ cd glx
$ make photopile
After running I get the following output errors
cc photopile.c -o photopile
photopile.c:38:23: fatal error: xlockmore.h: No such file or directory compilation terminated.
make: *** [photopile] Error 1
The referenced file is in the "hacks" root folder rather than the "glx" folder. I realize it would be simple enough to just copy that needed file to "glx", but the "xlockmore.h" file is not the only file that its trying to find that is not in the current directory.
It is also looking for "yarandom.h" in the "../../utils" folder.
I'm assuming the makefile was made correctly, and that I am doing something wrong with regards to calling the
make photopile
option from within the "glx" folder.
I'm still learning makefiles and would rather not modify it (or the directory structure by copying header files) anymore than the directions say to.
Any advice?
I guess this would be a generic question on including libraries with existing makefiles within cmake; but here's my context -
I'm trying to include scintilla in another CMake project, and I have the following problem:
On Linux, scintilla has a makefile in (say) the ${CMAKE_CURRENT_SOURCE_DIR}/scintilla/gtk directory; if you run make in that directory (as usual), you get a ${CMAKE_CURRENT_SOURCE_DIR}/scintilla/bin/scintilla.a file - which (I guess) is the static library.
Now, if I'd try to use cmake's ADD_LIBRARY, I'd have to manually specify the sources of scintilla within cmake - and I'd rather not mess with that, given I already have a makefile. So, I'd rather call the usual scintilla make - and then instruct CMAKE to somehow refer to the resulting scintilla.a. (I guess that this then would not ensure cross-platform compatibility - but note that currently cross-platform is not an issue for me; I'd just like to build scintilla as part of this project that already uses cmake, only within Linux)
So, I've tried a bit with this:
ADD_CUSTOM_COMMAND(
OUTPUT scintilla.a
COMMAND ${CMAKE_MAKE_PROGRAM}
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/scintilla/gtk
COMMENT "Original scintilla makefile target" )
... but then, add_custom_command adds a "target with no output"; so I'm trying several approach to build upon that, all of which fail (errors given as comment):
ADD_CUSTOM_TARGET(scintilla STATIC DEPENDS scintilla.a) # Target "scintilla" of type UTILITY may not be linked into another target.
ADD_LIBRARY(scintilla STATIC DEPENDS scintilla.a) # Cannot find source file "DEPENDS".
ADD_LIBRARY(scintilla STATIC) # You have called ADD_LIBRARY for library scintilla without any source files.
ADD_DEPENDENCIES(scintilla scintilla.a)
I'm obviously quote a noob with cmake - so, is it possible at all to have cmake run a pre-existing makefile, and "capture" its output library file, such that other components of the cmake project can link against it?
Many thanks for any answers,
Cheers!
EDIT: possible duplicate: CMake: how do i depend on output from a custom target? - Stack Overflow - however, here the breakage seems to be due to the need to specifically have a library that the rest of the cmake project would recognize...
Another related: cmake - adding a custom command with the file name as a target - Stack Overflow; however, it specifically builds an executable from source files (which I wanted to avoid)..
You could also use imported targets and a custom target like this:
# set the output destination
set(SCINTILLA_LIBRARY ${CMAKE_CURRENT_SOURCE_DIR}/scintilla/gtk/scintilla.a)
# create a custom target called build_scintilla that is part of ALL
# and will run each time you type make
add_custom_target(build_scintilla ALL
COMMAND ${CMAKE_MAKE_PROGRAM}
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/scintilla/gtk
COMMENT "Original scintilla makefile target")
# now create an imported static target
add_library(scintilla STATIC IMPORTED)
# Import target "scintilla" for configuration ""
set_property(TARGET scintilla APPEND PROPERTY IMPORTED_CONFIGURATIONS NOCONFIG)
set_target_properties(scintilla PROPERTIES
IMPORTED_LOCATION_NOCONFIG "${SCINTILLA_LIBRARY}")
# now you can use scintilla as if it were a regular cmake built target in your project
add_dependencies(scintilla build_scintilla)
add_executable(foo foo.c)
target_link_libraries(foo scintilla)
# note, this will only work on linux/unix platforms, also it does building
# in the source tree which is also sort of bad style and keeps out of source
# builds from working.
OK, I think I have it somewhat; basically, in the CMakeLists.txt that build scintilla, I used this only:
ADD_CUSTOM_TARGET(
scintilla.a ALL
COMMAND ${CMAKE_MAKE_PROGRAM}
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/scintilla/gtk
COMMENT "Original scintilla makefile target" )
... and then, the slightly more complicated part, was to find the correct cmake file elsewhere in the project, where the ${PROJECT_NAME} was defined - so as to add a dependency:
ADD_DEPENDENCIES(${PROJECT_NAME} scintilla.a)
... and finally, the library needs to be linked.
Note that in the commands heretofore, the scintilla.a is merely a name/label/identifier/string (so it could be anything else, like scintilla--a or something); but for linking - the full path to the actual `scintilla.a file is needed (which in this project ends up in a variable ${SCINTILLA_LIBRARY}). In this project, the linking basically occurs through a form of a
list(APPEND PROJ_LIBRARIES ${SCINTILLA_LIBRARY} )
... and I don't really know how cmake handles the actual linking afterwards (but it seems to work)
For consistency, I tried to use ${SCINTILLA_LIBRARY} instead of scintilla.a as identifier in the ADD_CUSTOM_TARGET, but got error: "Target names may not contain a slash. Use ADD_CUSTOM_COMMAND to generate files". So probably this could be solved smarter/more correct with ADD_CUSTOM_COMMAND - however, I read that it "defines a new command that can be executed during the build process. The outputs named should be listed as source files in the target for which they are to be generated."... And by now I'm totally confused so as to what is a file, what is a label, and what is a target - so I think I'll leave at this (and not fix it if it ain't broken :) )
Well, it'd still be nice to know a more correct way to do this eventually,
Cheers!
According to the wiki entry,
It packages up the files needed to build the project
I have a simple executables-only .cabal project, which basically contains
Executable myprog
hs-source-dirs: src
main-is: MyMain.hs
and is made up of some additional .hs files below src/ beyond src/MyMain.hs. E.g., src/Utils.hs and a few others.
cabal build has no problems building myprog, and compiles the required additional .hs files below src/, but cabal sdist does not, thus creating a dysfunctional source-tarball. What am I doing wrong? How do I tell cabal to include all source files below hs-source-dirs?
As a side-note, with GNU Autotools, there was a make distcheck target, which would first build a source-tarball, and then try to build the project via the newly generated source-tarball, thus ensuring everything's ok. Is there something similar for cabal, in order to make sure my source-tarball is sound?
You should list the other Haskell files in the .cabal file, inside the Executable stanza.
other-modules: Utils AFewOthers
The distribution only includes source files that are listed in your .cabal file. Cabal has no other way to detect which source files are in your package. You could still build because cabal build calls ghc --make, and ghc will find and compile all the source files it needs.