Update build.zig for release of 0.14.0 breaking language changes (#724)

With the release of zig 0.14.0, there are some breaking changes to syntax in build.zig.

Here, we drop support for zig 0.13, and add support for 0.14. There does not seem to be any advantage to try and support both simultaneously (nor did the zig maintainers make this easy).

---

Co-authored-by: qaptoR <rocco.ruscitti@outlook.com>

Author: qaptoR

build.zig

@@ -41,28 +41,33 @@ pub fn build(b: *std.Build) !void {
             .PCRE2_MAX_VARLOOKBEHIND = 255,
             .NEWLINE_DEFAULT = 2,
             .PCRE2_PARENS_NEST_LIMIT = 250,
+
+            .PCRE2GREP_BUFSIZE = 20480,
+            .PCRE2GREP_MAX_BUFSIZE = 1048576,
         },
     );
 
     // pcre2-8/16/32.so
 
+    const lib_mod = std.Build.Module.create(b, .{
+        .target = target,
+        .optimize = optimize,
+        .link_libc = true,
+    });
+
+    lib_mod.addCMacro("HAVE_CONFIG_H", "");
+    lib_mod.addCMacro("PCRE2_CODE_UNIT_WIDTH", @tagName(codeUnitWidth));
+    if (linkage == .static) {
+        lib_mod.addCMacro("PCRE2_STATIC", "");
+    }
+
     const lib = std.Build.Step.Compile.create(b, .{
         .name = b.fmt("pcre2-{s}", .{@tagName(codeUnitWidth)}),
-        .root_module = .{
-            .target = target,
-            .optimize = optimize,
-            .link_libc = true,
-        },
+        .root_module = lib_mod,
         .kind = .lib,
         .linkage = linkage,
     });
 
-    lib.defineCMacro("HAVE_CONFIG_H", null);
-    lib.defineCMacro("PCRE2_CODE_UNIT_WIDTH", @tagName(codeUnitWidth));
-    if (linkage == .static) {
-        lib.defineCMacro("PCRE2_STATIC", null);
-    }
-
     lib.addConfigHeader(config_header);
     lib.addIncludePath(pcre2_header_dir.getDirectory());
     lib.addIncludePath(b.path("src"));
@@ -108,36 +113,46 @@ pub fn build(b: *std.Build) !void {
     lib.installHeader(pcre2_header, "pcre2.h");
     b.installArtifact(lib);
 
-
     // pcre2test
 
-    const pcre2test = b.addExecutable(.{
-        .name = "pcre2test",
+    const pcre2test_mod = std.Build.Module.create(b, .{
         .target = target,
         .optimize = optimize,
+        .link_libc = true,
+        .imports = &.{std.Build.Module.Import{ .name = b.fmt("pcre2-{s}", .{@tagName(codeUnitWidth)}), .module = lib_mod }},
     });
 
+    pcre2test_mod.addCMacro("HAVE_CONFIG_H", "");
+
+    const pcre2test = b.addExecutable(.{
+        .name = "pcre2test",
+        .root_module = pcre2test_mod,
+    });
 
     // pcre2-posix.so
 
     if (codeUnitWidth == CodeUnitWidth.@"8") {
+        const posixLib_mod = std.Build.Module.create(b, .{
+            .target = target,
+            .optimize = optimize,
+            .link_libc = true,
+        });
+
+        pcre2test_mod.addImport("pcre2_posix", posixLib_mod);
+
+        posixLib_mod.addCMacro("HAVE_CONFIG_H", "");
+        posixLib_mod.addCMacro("PCRE2_CODE_UNIT_WIDTH", @tagName(codeUnitWidth));
+        if (linkage == .static) {
+            posixLib_mod.addCMacro("PCRE2_STATIC", "");
+        }
+
         const posixLib = std.Build.Step.Compile.create(b, .{
             .name = "pcre2-posix",
-            .root_module = .{
-                .target = target,
-                .optimize = optimize,
-                .link_libc = true,
-            },
+            .root_module = posixLib_mod,
             .kind = .lib,
             .linkage = linkage,
         });
 
-        posixLib.defineCMacro("HAVE_CONFIG_H", null);
-        posixLib.defineCMacro("PCRE2_CODE_UNIT_WIDTH", @tagName(codeUnitWidth));
-        if (linkage == .static) {
-            posixLib.defineCMacro("PCRE2_STATIC", null);
-        }
-
         posixLib.addConfigHeader(config_header);
         posixLib.addIncludePath(pcre2_header_dir.getDirectory());
         posixLib.addIncludePath(b.path("src"));
@@ -150,15 +165,10 @@ pub fn build(b: *std.Build) !void {
 
         posixLib.installHeader(b.path("src/pcre2posix.h"), "pcre2posix.h");
         b.installArtifact(posixLib);
-
-        pcre2test.linkLibrary(posixLib);
     }
 
-
     // pcre2test (again)
 
-    pcre2test.defineCMacro("HAVE_CONFIG_H", null);
-
     pcre2test.addConfigHeader(config_header);
     pcre2test.addIncludePath(pcre2_header_dir.getDirectory());
     pcre2test.addIncludePath(b.path("src"));
@@ -168,7 +178,6 @@ pub fn build(b: *std.Build) !void {
     });
 
     pcre2test.linkLibC();
-    pcre2test.linkLibrary(lib);
 
     b.installArtifact(pcre2test);
 }