__atomic_store error: incompatible integer to pointer conversion

[mingodad]

When trying to build cheerp on Ubuntu 18.04 with:

• https://github.com/leaningtech/cheerp-meta/releases/download/cheerp-3.0/cheerp-llvm-clang-3.0.tar.gz
• https://github.com/leaningtech/cheerp-meta/releases/download/cheerp-3.0/cheerp-libs-3.0.tar.gz
• https://github.com/leaningtech/cheerp-meta/releases/download/cheerp-3.0/cheerp-musl-3.0.tar.gz
• https://github.com/leaningtech/cheerp-meta/releases/download/cheerp-3.0/cheerp-utils-3.0.tar.gz

Makefile:151: recipe for target 'obj/crt/cheerp/crt1.o' failed
make: *** [obj/crt/cheerp/crt1.o] Error 1
make: *** Waiting for unfinished jobs....
In file included from ../src/aio/lio_listio.c:5:
In file included from ../src/internal/pthread_impl.h:11:
In file included from ../src/internal/atomic.h:6:
../arch/cheerp/atomic_arch.h:67:20: error: incompatible integer to pointer conversion passing 'int' to parameter of type 'volatile int *'; take the address with & [-Wint-conversion]
        __atomic_store(p, x, __ATOMIC_SEQ_CST);
                          ^
                          &
1 error generated.
1 error generated.

[mingodad]

When adding & to x -> __atomic_store(p, &x, __ATOMIC_SEQ_CST);:

cheerp/bin/clang -target cheerp-wasm -I cheerp/lib/clang/15.0.0/include -std=c99 -nostdinc -frounding-math -Wa,--noexecstack -D_XOPEN_SOURCE=700 -I../arch/cheerp -I../arch/generic -Iobj/src/internal -I../src/include -I../src/internal -Iobj/include -I../include  -Os -pipe -fomit-frame-pointer -fno-unwind-tables -fno-asynchronous-unwind-tables -ffunction-sections -fdata-sections -w -Wno-pointer-to-int-cast -Werror=implicit-function-declaration -Werror=implicit-int -Werror=pointer-sign -Werror=pointer-arith -Werror=int-conversion -Werror=incompatible-pointer-types -Qunused-arguments -Waddress -Warray-bounds -Wchar-subscripts -Wduplicate-decl-specifier -Winit-self -Wreturn-type -Wsequence-point -Wstrict-aliasing -Wunused-function -Wunused-label -Wunused-variable  -fno-stack-protector -c -o obj/src/env/__init_tls.o ../src/env/__init_tls.c
../src/env/__init_tls.c:22:43: error: incompatible pointer to integer conversion passing 'volatile int *' to parameter of type 'long' [-Wint-conversion]
        td->tid = __syscall(SYS_set_tid_address, &__thread_list_lock);
                                                 ^~~~~~~~~~~~~~~~~~~
../src/internal/syscall.h:55:49: note: expanded from macro '__syscall'
#define __syscall(...) __SYSCALL_DISP(__syscall,__VA_ARGS__)
                                                ^~~~~~~~~~~
../src/internal/syscall.h:53:80: note: expanded from macro '__SYSCALL_DISP'
#define __SYSCALL_DISP(b,...) __SYSCALL_CONCAT(b,__SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
                                                                               ^~~~~~~~~~~
../src/internal/syscall.h:32:27: note: expanded from macro '__syscall1'
#define __syscall1(n,a) n(a)
                          ^
../arch/cheerp/syscall_arch.h:262:37: note: passing argument to parameter 'a1' here
long __syscall_set_tid_address(long a1,...);
                                    ^
1 error generated.
Makefile:151: recipe for target 'obj/src/env/__init_tls.o' failed
make: *** [obj/src/env/__init_tls.o] Error 1

Notice this cheerp/lib/clang/15.0.0/include but https://github.com/leaningtech/cheerp-meta/releases/download/cheerp-3.0/cheerp-llvm-clang-3.0.tar.gz have clang16.

[yuri91]

Hi @mingodad,

The build instructions of musl on our docs page seem outdated.

Try with the instructions found in README.md in this repo. Those should work.

I will update the docs, thanks for reporting this!