gnu: zig: Respect the PKG_CONFIG environment variable.

* gnu/packages/patches/zig-0.9-build-respect-PKG_CONFIG-env-var.patch:
New file.
* gnu/packages/patches/zig-0.10-build-respect-PKG_CONFIG-env-var.patch:
New file.
* gnu/packages/patches/zig-0.11-build-respect-PKG_CONFIG-env-var.patch:
New file.
* gnu/packages/patches/zig-0.12-build-respect-PKG_CONFIG-env-var.patch:
New file.
* gnu/packages/patches/zig-0.13-build-respect-PKG_CONFIG-env-var.patch:
New file.
* gnu/local.mk (dist_patch_DATA): Register them.
* gnu/packages/zig.scm (zig-0.9,zig-0.10,zig-0.11,zig-0.12,zig-0.13)[source]:
Add patches.
* guix/build/zig-build-system.scm (configure): set PKG_CONFIG.

Change-Id: I0abf871c6990144fc472191bf1167aa2fc765161
Modified-by: Hilton Chain <hako@ultrarare.space>
Signed-off-by: Hilton Chain <hako@ultrarare.space>

8 files changed, 255 insertions, 0 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index 8f61b2d65c..02a6fa616e 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -2413,21 +2413,26 @@ dist_patch_DATA =						\
   %D%/packages/patches/xygrib-fix-finding-data.patch		\
   %D%/packages/patches/xygrib-newer-proj.patch			\
   %D%/packages/patches/yggdrasil-extra-config.patch	\
+  %D%/packages/patches/zig-0.9-build-respect-PKG_CONFIG-env-var.patch	\
   %D%/packages/patches/zig-0.9-fix-runpath.patch		\
   %D%/packages/patches/zig-0.9-riscv-support.patch		\
   %D%/packages/patches/zig-0.9-use-baseline-cpu-by-default.patch	\
   %D%/packages/patches/zig-0.9-use-system-paths.patch		\
+  %D%/packages/patches/zig-0.10-build-respect-PKG_CONFIG-env-var.patch	\
   %D%/packages/patches/zig-0.10-fix-runpath.patch		\
   %D%/packages/patches/zig-0.10-use-system-paths.patch		\
   %D%/packages/patches/zig-0.10.0-610-bootstrap-resolve-conflicts.patch	\
   %D%/packages/patches/zig-0.10.0-675-TypeOf-hack.patch		\
   %D%/packages/patches/zig-0.10.0-747-CallOptions.patch		\
   %D%/packages/patches/zig-0.10.0-1638-re-add-qualCast.patch	\
+  %D%/packages/patches/zig-0.11-build-respect-PKG_CONFIG-env-var.patch	\
   %D%/packages/patches/zig-0.11-fix-runpath.patch		\
   %D%/packages/patches/zig-0.11-use-system-paths.patch		\
+  %D%/packages/patches/zig-0.12-build-respect-PKG_CONFIG-env-var.patch	\
   %D%/packages/patches/zig-0.12-fix-runpath.patch		\
   %D%/packages/patches/zig-0.12-use-baseline-cpu-by-default.patch	\
   %D%/packages/patches/zig-0.12-use-system-paths.patch		\
+  %D%/packages/patches/zig-0.13-build-respect-PKG_CONFIG-env-var.patch	\
   %D%/packages/patches/zig-0.13-fix-runpath.patch		\
   %D%/packages/patches/zsh-egrep-failing-test.patch		\
   %D%/packages/patches/zuo-bin-sh.patch
diff --git a/gnu/packages/patches/zig-0.10-build-respect-PKG_CONFIG-env-var.patch b/gnu/packages/patches/zig-0.10-build-respect-PKG_CONFIG-env-var.patch
new file mode 100644
index 0000000000..a2a93a2711
--- /dev/null
+++ b/gnu/packages/patches/zig-0.10-build-respect-PKG_CONFIG-env-var.patch
@@ -0,0 +1,48 @@
+From eb630302e42f4f565d44f9894c5ab832b99267e2 Mon Sep 17 00:00:00 2001
+From: Hilton Chain <hako@ultrarare.space>
+Date: Sun, 17 Nov 2024 18:08:21 +0800
+Subject: [PATCH 1/5] zig build: respect `PKG_CONFIG` environment variable
+
+[Upstream commit: d263f1ec0eb988f0e4ed1859351f5040f590996b]
+
+`PKG_CONFIG` environment variable is used to override path to
+pkg-config executable, for example when it's name is prepended by
+target triple for cross-compilation purposes:
+
+```
+PKG_CONFIG=/usr/bin/aarch64-unknown-linux-gnu-pkgconf zig build
+```
+
+Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
+---
+ lib/std/build.zig | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/lib/std/build.zig b/lib/std/build.zig
+index 1b9a61beb6..2fa6afa12d 100644
+--- a/lib/std/build.zig
++++ b/lib/std/build.zig
+@@ -1284,7 +1284,8 @@ pub const Builder = struct {
+     }
+ 
+     fn execPkgConfigList(self: *Builder, out_code: *u8) (PkgConfigError || ExecError)![]const PkgConfigPkg {
+-        const stdout = try self.execAllowFail(&[_][]const u8{ "pkg-config", "--list-all" }, out_code, .Ignore);
++        const pkg_config_exe = self.env_map.get("PKG_CONFIG") orelse "pkg-config";
++        const stdout = try self.execAllowFail(&[_][]const u8{ pkg_config_exe, "--list-all" }, out_code, .Ignore);
+         var list = ArrayList(PkgConfigPkg).init(self.allocator);
+         errdefer list.deinit();
+         var line_it = mem.tokenize(u8, stdout, "\r\n");
+@@ -2113,8 +2114,9 @@ pub const LibExeObjStep = struct {
+         };
+ 
+         var code: u8 = undefined;
++        const pkg_config_exe = self.builder.env_map.get("PKG_CONFIG") orelse "pkg-config";
+         const stdout = if (self.builder.execAllowFail(&[_][]const u8{
+-            "pkg-config",
++            pkg_config_exe,
+             pkg_name,
+             "--cflags",
+             "--libs",
+-- 
+2.46.0
+
diff --git a/gnu/packages/patches/zig-0.11-build-respect-PKG_CONFIG-env-var.patch b/gnu/packages/patches/zig-0.11-build-respect-PKG_CONFIG-env-var.patch
new file mode 100644
index 0000000000..ef7110c32f
--- /dev/null
+++ b/gnu/packages/patches/zig-0.11-build-respect-PKG_CONFIG-env-var.patch
@@ -0,0 +1,48 @@
+From 0cdc9eedd666478ab6d0ca168ea7f7da91f94f2b Mon Sep 17 00:00:00 2001
+From: Eric Joldasov <bratishkaerik@landless-city.net>
+Date: Wed, 8 May 2024 23:21:34 +0500
+Subject: [PATCH 1/5] zig build: respect `PKG_CONFIG` environment variable
+
+[Upstream commit: d263f1ec0eb988f0e4ed1859351f5040f590996b]
+
+`PKG_CONFIG` environment variable is used to override path to
+pkg-config executable, for example when it's name is prepended by
+target triple for cross-compilation purposes:
+
+```
+PKG_CONFIG=/usr/bin/aarch64-unknown-linux-gnu-pkgconf zig build
+```
+
+Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
+---
+ lib/std/Build/Step/Compile.zig | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/lib/std/Build/Step/Compile.zig b/lib/std/Build/Step/Compile.zig
+index 335a7e2df7..1def445ef0 100644
+--- a/lib/std/Build/Step/Compile.zig
++++ b/lib/std/Build/Step/Compile.zig
+@@ -792,8 +792,9 @@ fn runPkgConfig(self: *Compile, lib_name: []const u8) ![]const []const u8 {
+     };
+ 
+     var code: u8 = undefined;
++    const pkg_config_exe = b.env_map.get("PKG_CONFIG") orelse "pkg-config";
+     const stdout = if (b.execAllowFail(&[_][]const u8{
+-        "pkg-config",
++        pkg_config_exe,
+         pkg_name,
+         "--cflags",
+         "--libs",
+@@ -2147,7 +2148,8 @@ pub fn doAtomicSymLinks(
+ }
+ 
+ fn execPkgConfigList(self: *std.Build, out_code: *u8) (PkgConfigError || ExecError)![]const PkgConfigPkg {
+-    const stdout = try self.execAllowFail(&[_][]const u8{ "pkg-config", "--list-all" }, out_code, .Ignore);
++    const pkg_config_exe = self.env_map.get("PKG_CONFIG") orelse "pkg-config";
++    const stdout = try self.execAllowFail(&[_][]const u8{ pkg_config_exe, "--list-all" }, out_code, .Ignore);
+     var list = ArrayList(PkgConfigPkg).init(self.allocator);
+     errdefer list.deinit();
+     var line_it = mem.tokenizeAny(u8, stdout, "\r\n");
+-- 
+2.46.0
+
diff --git a/gnu/packages/patches/zig-0.12-build-respect-PKG_CONFIG-env-var.patch b/gnu/packages/patches/zig-0.12-build-respect-PKG_CONFIG-env-var.patch
new file mode 100644
index 0000000000..e2d6305f50
--- /dev/null
+++ b/gnu/packages/patches/zig-0.12-build-respect-PKG_CONFIG-env-var.patch
@@ -0,0 +1,48 @@
+From 80c90add63c44f2e06c73c13400d044a81078602 Mon Sep 17 00:00:00 2001
+From: Eric Joldasov <bratishkaerik@landless-city.net>
+Date: Wed, 8 May 2024 23:21:34 +0500
+Subject: [PATCH 1/5] zig build: respect `PKG_CONFIG` environment variable
+
+[Upstream commit: d263f1ec0eb988f0e4ed1859351f5040f590996b]
+
+`PKG_CONFIG` environment variable is used to override path to
+pkg-config executable, for example when it's name is prepended by
+target triple for cross-compilation purposes:
+
+```
+PKG_CONFIG=/usr/bin/aarch64-unknown-linux-gnu-pkgconf zig build
+```
+
+Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
+---
+ lib/std/Build/Step/Compile.zig | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/lib/std/Build/Step/Compile.zig b/lib/std/Build/Step/Compile.zig
+index 5bf0805e79..58ff3a0df6 100644
+--- a/lib/std/Build/Step/Compile.zig
++++ b/lib/std/Build/Step/Compile.zig
+@@ -703,8 +703,9 @@ fn runPkgConfig(self: *Compile, lib_name: []const u8) !PkgConfigResult {
+     };
+ 
+     var code: u8 = undefined;
++    const pkg_config_exe = b.graph.env_map.get("PKG_CONFIG") orelse "pkg-config";
+     const stdout = if (b.runAllowFail(&[_][]const u8{
+-        "pkg-config",
++        pkg_config_exe,
+         pkg_name,
+         "--cflags",
+         "--libs",
+@@ -1824,7 +1825,8 @@ pub fn doAtomicSymLinks(
+ }
+ 
+ fn execPkgConfigList(self: *std.Build, out_code: *u8) (PkgConfigError || RunError)![]const PkgConfigPkg {
+-    const stdout = try self.runAllowFail(&[_][]const u8{ "pkg-config", "--list-all" }, out_code, .Ignore);
++    const pkg_config_exe = self.graph.env_map.get("PKG_CONFIG") orelse "pkg-config";
++    const stdout = try self.runAllowFail(&[_][]const u8{ pkg_config_exe, "--list-all" }, out_code, .Ignore);
+     var list = ArrayList(PkgConfigPkg).init(self.allocator);
+     errdefer list.deinit();
+     var line_it = mem.tokenizeAny(u8, stdout, "\r\n");
+-- 
+2.46.0
+
diff --git a/gnu/packages/patches/zig-0.13-build-respect-PKG_CONFIG-env-var.patch b/gnu/packages/patches/zig-0.13-build-respect-PKG_CONFIG-env-var.patch
new file mode 100644
index 0000000000..09126eed9e
--- /dev/null
+++ b/gnu/packages/patches/zig-0.13-build-respect-PKG_CONFIG-env-var.patch
@@ -0,0 +1,48 @@
+From adc58a23c88f3f2004993043e36d72950fd12d00 Mon Sep 17 00:00:00 2001
+From: Eric Joldasov <bratishkaerik@landless-city.net>
+Date: Wed, 8 May 2024 23:21:34 +0500
+Subject: [PATCH] zig build: respect `PKG_CONFIG` environment variable
+
+[Upstream commit: d263f1ec0eb988f0e4ed1859351f5040f590996b.]
+
+`PKG_CONFIG` environment variable is used to override path to
+pkg-config executable, for example when it's name is prepended by
+target triple for cross-compilation purposes:
+
+```
+PKG_CONFIG=/usr/bin/aarch64-unknown-linux-gnu-pkgconf zig build
+```
+
+Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
+---
+ lib/std/Build/Step/Compile.zig | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/lib/std/Build/Step/Compile.zig b/lib/std/Build/Step/Compile.zig
+index d18d8de413..fdc641f802 100644
+--- a/lib/std/Build/Step/Compile.zig
++++ b/lib/std/Build/Step/Compile.zig
+@@ -701,8 +701,9 @@ fn runPkgConfig(compile: *Compile, lib_name: []const u8) !PkgConfigResult {
+     };
+ 
+     var code: u8 = undefined;
++    const pkg_config_exe = b.graph.env_map.get("PKG_CONFIG") orelse "pkg-config";
+     const stdout = if (b.runAllowFail(&[_][]const u8{
+-        "pkg-config",
++        pkg_config_exe,
+         pkg_name,
+         "--cflags",
+         "--libs",
+@@ -1823,7 +1824,8 @@ pub fn doAtomicSymLinks(
+ }
+ 
+ fn execPkgConfigList(compile: *std.Build, out_code: *u8) (PkgConfigError || RunError)![]const PkgConfigPkg {
+-    const stdout = try compile.runAllowFail(&[_][]const u8{ "pkg-config", "--list-all" }, out_code, .Ignore);
++    const pkg_config_exe = compile.graph.env_map.get("PKG_CONFIG") orelse "pkg-config";
++    const stdout = try compile.runAllowFail(&[_][]const u8{ pkg_config_exe, "--list-all" }, out_code, .Ignore);
+     var list = ArrayList(PkgConfigPkg).init(compile.allocator);
+     errdefer list.deinit();
+     var line_it = mem.tokenizeAny(u8, stdout, "\r\n");
+-- 
+2.46.0
+
diff --git a/gnu/packages/patches/zig-0.9-build-respect-PKG_CONFIG-env-var.patch b/gnu/packages/patches/zig-0.9-build-respect-PKG_CONFIG-env-var.patch
new file mode 100644
index 0000000000..a1b41fcc55
--- /dev/null
+++ b/gnu/packages/patches/zig-0.9-build-respect-PKG_CONFIG-env-var.patch
@@ -0,0 +1,48 @@
+From 302d9fe6de6572f82c77c63585f77edb858197d7 Mon Sep 17 00:00:00 2001
+From: Hilton Chain <hako@ultrarare.space>
+Date: Sun, 17 Nov 2024 18:08:21 +0800
+Subject: [PATCH 1/5] zig build: respect `PKG_CONFIG` environment variable
+
+[Upstream commit: d263f1ec0eb988f0e4ed1859351f5040f590996b]
+
+`PKG_CONFIG` environment variable is used to override path to
+pkg-config executable, for example when it's name is prepended by
+target triple for cross-compilation purposes:
+
+```
+PKG_CONFIG=/usr/bin/aarch64-unknown-linux-gnu-pkgconf zig build
+```
+
+Signed-off-by: Eric Joldasov <bratishkaerik@landless-city.net>
+---
+ lib/std/build.zig | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/lib/std/build.zig b/lib/std/build.zig
+index 8eda542d6e..e44093bde4 100644
+--- a/lib/std/build.zig
++++ b/lib/std/build.zig
+@@ -1265,7 +1265,8 @@ pub const Builder = struct {
+     }
+ 
+     fn execPkgConfigList(self: *Builder, out_code: *u8) ![]const PkgConfigPkg {
+-        const stdout = try self.execAllowFail(&[_][]const u8{ "pkg-config", "--list-all" }, out_code, .Ignore);
++        const pkg_config_exe = self.env_map.get("PKG_CONFIG") orelse "pkg-config";
++        const stdout = try self.execAllowFail(&[_][]const u8{ pkg_config_exe, "--list-all" }, out_code, .Ignore);
+         var list = ArrayList(PkgConfigPkg).init(self.allocator);
+         errdefer list.deinit();
+         var line_it = mem.tokenize(u8, stdout, "\r\n");
+@@ -1932,8 +1933,9 @@ pub const LibExeObjStep = struct {
+         };
+ 
+         var code: u8 = undefined;
++        const pkg_config_exe = self.builder.env_map.get("PKG_CONFIG") orelse "pkg-config";
+         const stdout = if (self.builder.execAllowFail(&[_][]const u8{
+-            "pkg-config",
++            pkg_config_exe,
+             pkg_name,
+             "--cflags",
+             "--libs",
+-- 
+2.46.0
+
diff --git a/gnu/packages/zig.scm b/gnu/packages/zig.scm
index cbdff2c2ff..c88ada73eb 100644
--- a/gnu/packages/zig.scm
+++ b/gnu/packages/zig.scm
@@ -79,6 +79,7 @@
                  "0nfvgg23sw50ksy0z0ml6lkdsvmd0278mq29m23dbb2jsirkhry7"))
        (patches
         (search-patches
+         "zig-0.9-build-respect-PKG_CONFIG-env-var.patch"
          "zig-0.9-riscv-support.patch"
          "zig-0.9-use-baseline-cpu-by-default.patch"
          "zig-0.9-use-system-paths.patch"
@@ -212,6 +213,7 @@ toolchain.  Among other features it provides
                  "1sh5xjsksl52i4cfv1qj36sz5h0ln7cq4pdhgs3960mk8a90im7b"))
        (patches
         (search-patches
+         "zig-0.10-build-respect-PKG_CONFIG-env-var.patch"
          "zig-0.9-use-baseline-cpu-by-default.patch"
          "zig-0.10-use-system-paths.patch"
          "zig-0.10-fix-runpath.patch"))))
@@ -1116,6 +1118,7 @@ toolchain.  Among other features it provides
                  "0qh7c27cd4wcdjj0mbpkarvwypfk1js8hkyxs0z149qv75zkbrca"))
        (patches
         (search-patches
+         "zig-0.11-build-respect-PKG_CONFIG-env-var.patch"
          "zig-0.9-use-baseline-cpu-by-default.patch"
          "zig-0.11-use-system-paths.patch"
          "zig-0.11-fix-runpath.patch"))))
@@ -1467,6 +1470,7 @@ toolchain.  Among other features it provides
                  "0ssgfrsk116p16rwjwq1z2pvvcdij6s30s19bhzjms7maz4s77hb"))
        (patches
         (search-patches
+         "zig-0.12-build-respect-PKG_CONFIG-env-var.patch"
          "zig-0.12-use-baseline-cpu-by-default.patch"
          "zig-0.12-use-system-paths.patch"
          "zig-0.12-fix-runpath.patch"))))
@@ -1548,6 +1552,7 @@ toolchain.  Among other features it provides
                  "0ly8042lbsa8019g0d1jg4l06rxpq2530n9mijq66n4lmx7a5976"))
        (patches
         (search-patches
+         "zig-0.13-build-respect-PKG_CONFIG-env-var.patch"
          "zig-0.12-use-baseline-cpu-by-default.patch"
          "zig-0.12-use-system-paths.patch"
          "zig-0.13-fix-runpath.patch"))))
diff --git a/guix/build/zig-build-system.scm b/guix/build/zig-build-system.scm
index 90d1a644bb..9959a95ce4 100644
--- a/guix/build/zig-build-system.scm
+++ b/guix/build/zig-build-system.scm
@@ -39,6 +39,11 @@
   ;; Set cache dir, otherwise Zig looks for `$HOME/.cache'.
   (setenv "ZIG_GLOBAL_CACHE_DIR" global-cache-dir)
 
+  (setenv "PKG_CONFIG"
+          (if target
+              (string-append target "-pkg-config")
+              "pkg-config"))
+
   ;; Libc paths for target.
   (let ((libc (assoc-ref inputs (if target "cross-libc" "libc")))
         (port (open-file "/tmp/guix-zig-libc-paths" "w" #:encoding "utf8")))