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stage3 bsd: support dynamic libstdc++/libc++

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Currently llvm-linkage mode (static vs dynamic) decides linkage mode
for system libstdc++/libc++ .

A previous commit only tested static mode for *BSD and netbsd was
reported to not work in dynamic mode.

We now special-case freebsd, openbsd, netbsd and dragonfly for dynamic
linking too.
This commit is contained in:
Michael Dusan 2023-01-06 00:57:08 -05:00 • committed by Andrew Kelley
parent 6bb82dad43
commit da96e7efcc
1 changed files with 16 additions and 15 deletions
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21
build.zig
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@ -589,14 +589,11 @@ fn addCmakeCfgOptionsToExe(
if (use_zig_libcxx) {
exe.linkLibCpp();
} else {
const need_cpp_includes = true;
const lib_suffix = switch (cfg.llvm_linkage) {
.static => exe.target.staticLibSuffix()[1..],
.dynamic => exe.target.dynamicLibSuffix()[1..],
};
// System -lc++ must be used because in this code path we are attempting to link
// against system-provided LLVM, Clang, LLD.
const need_cpp_includes = true;
const static = cfg.llvm_linkage == .static;
const lib_suffix = if (static) exe.target.staticLibSuffix()[1..] else exe.target.dynamicLibSuffix()[1..];
switch (exe.target.getOsTag()) {
.linux => {
// First we try to link against gcc libstdc++. If that doesn't work, we fall
@ -613,20 +610,24 @@ fn addCmakeCfgOptionsToExe(
exe.linkSystemLibrary("c++");
},
.freebsd => {
if (static) {
try addCxxKnownPath(b, cfg, exe, b.fmt("libc++.{s}", .{lib_suffix}), null, need_cpp_includes);
try addCxxKnownPath(b, cfg, exe, b.fmt("libgcc_eh.{s}", .{lib_suffix}), null, need_cpp_includes);
} else {
try addCxxKnownPath(b, cfg, exe, b.fmt("libc++.{s}", .{lib_suffix}), null, need_cpp_includes);
}
},
.openbsd => {
try addCxxKnownPath(b, cfg, exe, b.fmt("libc++.{s}", .{lib_suffix}), null, need_cpp_includes);
try addCxxKnownPath(b, cfg, exe, b.fmt("libc++abi.{s}", .{lib_suffix}), null, need_cpp_includes);
},
.netbsd => {
.netbsd, .dragonfly => {
if (static) {
try addCxxKnownPath(b, cfg, exe, b.fmt("libstdc++.{s}", .{lib_suffix}), null, need_cpp_includes);
try addCxxKnownPath(b, cfg, exe, b.fmt("libgcc_eh.{s}", .{lib_suffix}), null, need_cpp_includes);
},
.dragonfly => {
} else {
try addCxxKnownPath(b, cfg, exe, b.fmt("libstdc++.{s}", .{lib_suffix}), null, need_cpp_includes);
try addCxxKnownPath(b, cfg, exe, b.fmt("libgcc_eh.{s}", .{lib_suffix}), null, need_cpp_includes);
}
},
else => {},
}