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fix thread local variables for non- position independent code

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This fixes comes thanks to Rich Felker from the musl libc project,
who gave me this crucial information:

"to satisfy the abi, your init code has to write the same value
to that memory location as the value passed to the [arch_prctl]
syscall"

This commit also changes the rules for when to build statically
by default. When building objects and static libraries, position
independent code is disabled if no libraries will be dynamically
linked and the target does not require position independent code.

closes #2063
This commit is contained in:
Andrew Kelley
2019-04-04 01:08:26 -04:00
parent 70ae3222b5
commit e4d595a8ba
6 changed files with 15 additions and 31 deletions
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5
src/main.cpp
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@@ -938,11 +938,6 @@ int main(int argc, char **argv) {
return print_error_usage(arg0);
}
if (out_type != OutTypeLib && is_dynamic) {
fprintf(stderr, "`-dynamic` may only be specified with `build-lib`.\n");
return print_error_usage(arg0);
}
if (llvm_argv.length > 1) {
llvm_argv.append(nullptr);
ZigLLVMParseCommandLineOptions(llvm_argv.length - 1, llvm_argv.items);