lopsub/Makefile, branch debian

Rework Makefile to support cross compilation.

2025-09-20T16:21:32Z

Build lopsubgen twice during cross compilation since it is both run and installed. This will enable cross building liblopsub on other distributions such as Yocto or PtxDist. Signed-off-by: Andre Noll

build: Never remove any intermediate files.

2025-09-20T16:21:32Z

Defining .SECONDARY instructs make(1) to never drop the files generated by lex. This avoids spurious rebuilds, speeding up the build.

build: Honor LDFLAGS

2024-05-10T01:20:48Z

It's good practice to include CPPFLAGS, CFLAGS and LDFLAGS in the rules which invoke the linker. We already do this for the former two, so do the same with LDFLAGS as well.

Add target to create a static library.

2024-02-25T16:04:30Z

It's sometimes handy to create a static version of the library, although this is generally frowned upon. No standard target depends on the new liblopsub.a target, so the static library is not build by default. One has to explicitly run "make liblopsub.a" to build it.

Makefile: Include Makefile.local if it exists.

2023-11-07T14:03:13Z

This provides a way to support local recipes.

Makefile: Add -ffile-prefix-map to CC to avoid embedding build paths.

2023-06-27T21:05:32Z

Signed-off-by: Andre Noll

build: Error out on implicit function declarations.

2021-04-28T21:16:13Z

Replacing lopsub.h by an empty file builds a buggy lopsubgen-stage1 executable which segfaults due to a format string mismatch caused by the implicit declaration of lls_version(). In this package all functions are supposed to be declared, so let's fail the build if any undeclared functions are found. Tested-by: Alex Gietz

build: Improve handling of compiler options.

2021-04-28T21:16:13Z

Introduce LLS_CFLAGS and STRICT_CFLAGS to avoid duplicating the flags in the various cc recipes. We don't touch CFLAGS or CPPFLAGS in the Makefile but include it the cc commands to let the user override our settings.

build: Activate .DELETE_ON_ERROR.

2021-04-28T21:15:33Z

Since m4 lacks the -o option to specify an output file, we redirect stdout in several recipes, in particular in the recipe that creates lopsub.h from lopsub.h.m4. If the m4 command fails, lopsub.h will be incomplete or empty, yet it will be considered as up-to-date by make(1). This patch teaches make(1) to remove such incomplete output files on errors.

build: Bail out early if m4 or lex don't exist.

2021-04-28T21:04:10Z

This gives a decent error message on the attempt to run make(1) on a system where one or both of these essential programs are not installed. A previous version of the patch used .SHELLSTATUS instead of the dummy variable, but this did not work with make-4.1 which ships with Ubuntu-18.04. Suggested-by: Alex Gietz