Build problems on OpenBSD

[vl-ms]

; make
cd build; cmake ../ -DCMAKE_BUILD_TYPE=Release
-- The C compiler identification is Clang 13.0.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Building in Release mode
-- Building with Clang 13.0.0 on OpenBSD-7.2
-- C flags:
-- C Debug flags:   -g -ggdb -O0 -fno-omit-frame-pointer
-- C Release flags: -O3 -DNDEBUG -g
--   BUILD_WITH_ASAN: OFF
--   USE_EXTERNAL_FFI: OFF
-- Performing Test UV_LINT_W4
-- Performing Test UV_LINT_W4 - Failed
-- Performing Test UV_LINT_NO_UNUSED_PARAMETER_MSVC
-- Performing Test UV_LINT_NO_UNUSED_PARAMETER_MSVC - Failed
-- Performing Test UV_LINT_NO_CONDITIONAL_CONSTANT_MSVC
-- Performing Test UV_LINT_NO_CONDITIONAL_CONSTANT_MSVC - Failed
-- Performing Test UV_LINT_NO_NONSTANDARD_MSVC
-- Performing Test UV_LINT_NO_NONSTANDARD_MSVC - Failed
-- Performing Test UV_LINT_NO_NONSTANDARD_EMPTY_TU_MSVC
-- Performing Test UV_LINT_NO_NONSTANDARD_EMPTY_TU_MSVC - Failed
-- Performing Test UV_LINT_NO_NONSTANDARD_FILE_SCOPE_MSVC
-- Performing Test UV_LINT_NO_NONSTANDARD_FILE_SCOPE_MSVC - Failed
-- Performing Test UV_LINT_NO_NONSTANDARD_NONSTATIC_DLIMPORT_MSVC
-- Performing Test UV_LINT_NO_NONSTANDARD_NONSTATIC_DLIMPORT_MSVC - Failed
-- Performing Test UV_LINT_NO_HIDES_LOCAL
-- Performing Test UV_LINT_NO_HIDES_LOCAL - Failed
-- Performing Test UV_LINT_NO_HIDES_PARAM
-- Performing Test UV_LINT_NO_HIDES_PARAM - Failed
-- Performing Test UV_LINT_NO_HIDES_GLOBAL
-- Performing Test UV_LINT_NO_HIDES_GLOBAL - Failed
-- Performing Test UV_LINT_NO_CONDITIONAL_ASSIGNMENT_MSVC
-- Performing Test UV_LINT_NO_CONDITIONAL_ASSIGNMENT_MSVC - Failed
-- Performing Test UV_LINT_NO_UNSAFE_MSVC
-- Performing Test UV_LINT_NO_UNSAFE_MSVC - Failed
-- Performing Test UV_LINT_WALL
-- Performing Test UV_LINT_WALL - Success
-- Performing Test UV_LINT_NO_UNUSED_PARAMETER
-- Performing Test UV_LINT_NO_UNUSED_PARAMETER - Success
-- Performing Test UV_LINT_STRICT_PROTOTYPES
-- Performing Test UV_LINT_STRICT_PROTOTYPES - Success
-- Performing Test UV_LINT_EXTRA
-- Performing Test UV_LINT_EXTRA - Success
-- Performing Test UV_LINT_UTF8_MSVC
-- Performing Test UV_LINT_UTF8_MSVC - Failed
-- Performing Test UV_F_STRICT_ALIASING
-- Performing Test UV_F_STRICT_ALIASING - Success
-- summary of build options:
    Install prefix:  /usr/local
    Target system:   OpenBSD
    Compiler:
      C compiler:    /usr/bin/cc (Clang)
      CFLAGS:

-- The CXX compiler identification is Clang 13.0.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
----
Generator:  Unix Makefiles
Compiler:   Clang
Build Type: Release
LTO:        ON
Flags:          -Dd_m3HasTracer -Wall -Wextra -Wparentheses -Wundef -Wpointer-arith -Wstrict-aliasing=2 -Werror=implicit-function-declaration -Wno-unused-function -Wno-unused-variable -Wno-unused-parameter -Wno-missing-field-initializers -Dd_m3HasWASI
Debug flags:   -g -ggdb -O0 -fno-omit-frame-pointer -ggdb -O0
Release flags: -O3 -Wfatal-errors -fomit-frame-pointer -fno-stack-check -fno-stack-protector -march=native
----
-- Found CURL: /usr/local/lib/libcurl.so.26.17 (found version "7.86.0")
-- Configuring done
-- Generating done
-- Build files have been written to: /home/unix/software/txiki.js/build
cmake --build build -j
make: option requires an argument -- j
usage: make [-BeiknpqrSst] [-C directory] [-D variable] [-d flags] [-f mk]
            [-I directory] [-j max_processes] [-m directory] [-V variable]
            [NAME=value] [target ...]
*** Error 2 in /home/unix/software/txiki.js (Makefile:7 'build')
;

Basically, the "-j $(shell nproc)" parts are Linux-specific. I don't think that there is an equivalent on OpenBSD or Unices in general.
After removing these parts, there is a new problem:

; make
cmake --build build
[  0%] Building C object deps/wasm3/source/CMakeFiles/m3.dir/m3_api_libc.c.o
[  1%] Building C object deps/wasm3/source/CMakeFiles/m3.dir/m3_api_wasi.c.o
/home/unix/software/txiki.js/deps/wasm3/source/m3_api_wasi.c:47:16: fatal error: 'sys/random.h' file not found
#      include <sys/random.h>
               ^~~~~~~~~~~~~~
1 error generated.
*** Error 1 in build (deps/wasm3/source/CMakeFiles/m3.dir/build.make:90 'deps/wasm3/source/CMakeFiles/m3.dir/m3_api_wasi.c.o': cd /home/unix...)
*** Error 2 in build (CMakeFiles/Makefile2:1121 'deps/wasm3/source/CMakeFiles/m3.dir/all': /usr/bin/make -s -f deps/wasm3/source/CMakeFiles/...)
*** Error 2 in build (Makefile:136 'all': /usr/bin/make -s -f CMakeFiles/Makefile2 all)
*** Error 2 in /home/unix/software/txiki.js (Makefile:7 'build')
;

This is the problem with the upstream wasm3, though. I will report it there & probably suggest to use https://man.openbsd.org/arc4random.3 instead. Will keep you updated once that is fixed!

[saghul]

Thanks for the report! Happy to update wasm3 once fixed there. DO you have any suggestions for the Makefile?

[vl-ms]

Not yet

[vl-ms]

Instructions from here https://github.com/wasm3/wasm3/blob/main/docs/Development.md work perfectly fine for me:

mkdir -p build
cd build
cmake ..
make -j8

But seems like your Makefile tries to build it by using cmake directly without the make step:

BUILD_DIR=build                                                                                                                                                                                                                                
BUILDTYPE?=Release
...
$(BUILD_DIR)/Makefile:                                                                                                                                                                                                                         
        @mkdir -p $(BUILD_DIR)                                                                                                                                                                                                                 
        cd $(BUILD_DIR); cmake ../ -DCMAKE_BUILD_TYPE=$(BUILDTYPE)

I'm not skilled in writing Makefiles, but basically there should be an exception for wasm3. I might dig into this myself, but probably not today, sadly.

[Alhadis]

Basically, the -j $(shell nproc) parts are Linux-specific. I don't think that there is an equivalent on OpenBSD or Unices in general.

BSD-flavoured make(1) implementations can use != assignments to store the result of a shell command (though this doesn't work in GNU Make):

OS_NAME != uname -v

all:
	@ echo "You are running $(OS_NAME)."

However, there's no good reason for your Makefile to use $(shell …) instead of ordinary command substitution. Try this instead:

 build: $(BUILD_DIR)/Makefile
-	cmake --build $(BUILD_DIR) -j $(shell nproc)
+	cmake --build $(BUILD_DIR) -j "`nproc`"

$(…) may be used instead of `…`, but the dollar-sign requires escaping:

 build: $(BUILD_DIR)/Makefile
-	cmake --build $(BUILD_DIR) -j $(shell nproc)
+	cmake --build $(BUILD_DIR) -j "$$(nproc)"

Your makefile includes other constructs which aren't portable between Make implementations, so it might be wise to rename it GNUmakefile and add a BSDmakefile to either invoke GNU Make or bail with a meaningful error, depending on whether gnumake exists in the user's $PATH:

BSDmakefile:

# -*- makefile-bsdmake -*- vim: ft=make

make != \
	unset exe; \
	for cmd in gnumake gmake gnu-make; do \
		exe=`command -v "$$cmd" 2>&1 || :`; \
		[ ! "$$exe" ] || break; \
	done; \
	[ "$$exe" ] && [ -x "$$exe" ] || \
		exe='echo >&2 "GNU Make is required to build this project." && exit 2'\ \#; \
	printf %s "$$exe"

.DEFAULT:
	@ ${make} $@

[saghul]

Interesting! Thanks for sharing this!