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minor cosmetic fixups

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* fix typos and redundancies in docs
* use Target.isGnuLibc
This commit is contained in:
Andrew Kelley 2024-01-04 17:26:06 -07:00
parent cbaaf6477f
commit 362460ec24
2 changed files with 6 additions and 8 deletions
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12
lib/libc/glibc/README.md vendored
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@ -1,15 +1,13 @@
# Zig GNU C Library ("glibc") Support # Zig GNU C Library ("glibc") Support
*Date*: November, 2023
Zig supports building binaries that will dynamically link against the Zig supports building binaries that will dynamically link against the
[GNU C Library ("glibc")](https://www.gnu.org/software/libc/) when run. [GNU C Library ("glibc")](https://www.gnu.org/software/libc/) when run.
This support extends across a range of glibc versions. This support extends across a range of glibc versions.
By default, Zig binaries will not depend on any external C library, but By default, Zig binaries will not depend on any external C library, but
they can be linked against one with the `-lc` option. The compilation they can be linked against one with the `-lc` option. The target ABI defines
target defines which C library: `musl` for the which C library: `musl` for the [musl C library](https://musl.libc.org/) or
[musl C library](https://musl.libc.org/) or `gnu` for the GNU C library. `gnu` for the GNU C library.
A specific GNU C library version can be chosen with an appropriate A specific GNU C library version can be chosen with an appropriate
`-target`. For example, `-target native-native-gnu.2.19` will use the `-target`. For example, `-target native-native-gnu.2.19` will use the
@ -30,7 +28,7 @@ do not reference an actual implementation.
## Targets ## Targets
The GNU C Library supports a very wide set of platforms and architectures. The GNU C Library supports a very wide set of platforms and architectures.
The current Zig support for glibc only supports Linux. The current Zig support for glibc only includes Linux.
Zig supports glibc versions back to v2.17 (2012) as the Zig standard Zig supports glibc versions back to v2.17 (2012) as the Zig standard
library depends on symbols that were introduced in 2.17. library depends on symbols that were introduced in 2.17.
@ -58,7 +56,7 @@ family of functions).
The related Zig https://github.com/ziglang/universal-headers is a project The related Zig https://github.com/ziglang/universal-headers is a project
designed to more robustly build multi-version header files suitable for designed to more robustly build multi-version header files suitable for
compliation across a variety of target C library versions. compilation across a variety of target C library versions.
## Glibc static C-Runtime object files and libraries ## Glibc static C-Runtime object files and libraries

2
src/target.zig
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@ -164,7 +164,7 @@ pub fn canBuildLibC(target: std.Target) bool {
return ver.min.order(libc.os_ver.?) != .lt; return ver.min.order(libc.os_ver.?) != .lt;
} }
// Ensure glibc (aka *-linux-gnu) version is supported // Ensure glibc (aka *-linux-gnu) version is supported
if ((target.os.tag == .linux) and target.abi.isGnu()) { if (target.isGnuLibC()) {
const min_glibc_ver = libc.glibc_min orelse glibc_min_version; const min_glibc_ver = libc.glibc_min orelse glibc_min_version;
const target_glibc_ver = target.os.version_range.linux.glibc; const target_glibc_ver = target.os.version_range.linux.glibc;
return target_glibc_ver.order(min_glibc_ver) != .lt; return target_glibc_ver.order(min_glibc_ver) != .lt;