libc-test: Set the gnu time64 preprocessor symbols for all ptr32

Set _TIME_BITS=64 and _FILE_OFFSET_BITS=64 preprocessor symbols for
the C test code as for building the code.

Author: snogge

libc-test/build.rs

@@ -3260,6 +3260,31 @@ fn test_vxworks(target: &str) {
     cfg.generate("../src/lib.rs", "main.rs");
 }
 
+fn config_gnu_time64(target: &str, cfg: &mut ctest::TestGenerator) {
+    let gnu = target.contains("gnu");
+    let x32 = target.contains("x32");
+    let riscv = target.contains("riscv32");
+
+    if gnu && &env::var("CARGO_CFG_TARGET_POINTER_WIDTH").unwrap() == "32" && !riscv && !x32 {
+        match env::var("RUST_LIBC_TIME_BITS") {
+            Ok(time_bits) => {
+                if time_bits == "64" || time_bits == "default" {
+                    cfg.define("_TIME_BITS", Some("64"));
+                    cfg.define("_FILE_OFFSET_BITS", Some("64"));
+                    cfg.cfg("gnu_time64_abi", None);
+                } else if time_bits != "32" {
+                    panic!("Unsupported RUST_LIBC_TIME_BITS value {}", time_bits)
+                }
+            }
+            Err(_) => {
+                cfg.define("_TIME_BITS", Some("64"));
+                cfg.define("_FILE_OFFSET_BITS", Some("64"));
+                cfg.cfg("gnu_time64_abi", None);
+            }
+        }
+    }
+}
+
 fn test_linux(target: &str) {
     assert!(target.contains("linux"));
 
@@ -3302,6 +3327,8 @@ fn test_linux(target: &str) {
     // glibc versions older than 2.29.
     cfg.define("__GLIBC_USE_DEPRECATED_SCANF", None);
 
+    config_gnu_time64(target, &mut cfg);
+
     headers! { cfg:
                "ctype.h",
                "dirent.h",
@@ -4433,6 +4460,7 @@ fn test_linux_like_apis(target: &str) {
     if linux || android || emscripten {
         // test strerror_r from the `string.h` header
         let mut cfg = ctest_cfg();
+        config_gnu_time64(target, &mut cfg);
         cfg.skip_type(|_| true).skip_static(|_| true);
 
         headers! { cfg: "string.h" }
@@ -4449,6 +4477,7 @@ fn test_linux_like_apis(target: &str) {
         // test fcntl - see:
         // http://man7.org/linux/man-pages/man2/fcntl.2.html
         let mut cfg = ctest_cfg();
+        config_gnu_time64(target, &mut cfg);
 
         if musl {
             cfg.header("fcntl.h");
@@ -4478,6 +4507,7 @@ fn test_linux_like_apis(target: &str) {
     if linux || android {
         // test termios
         let mut cfg = ctest_cfg();
+        config_gnu_time64(target, &mut cfg);
         cfg.header("asm/termbits.h");
         cfg.header("linux/termios.h");
         cfg.skip_type(|_| true)
@@ -4502,6 +4532,7 @@ fn test_linux_like_apis(target: &str) {
     if linux || android {
         // test IPV6_ constants:
         let mut cfg = ctest_cfg();
+        config_gnu_time64(target, &mut cfg);
         headers! {
             cfg:
             "linux/in6.h"
@@ -4533,6 +4564,7 @@ fn test_linux_like_apis(target: &str) {
         // "resolve.h" defines a `p_type` macro that expands to `__p_type`
         // making the tests for these fails when both are included.
         let mut cfg = ctest_cfg();
+        config_gnu_time64(target, &mut cfg);
         cfg.header("elf.h");
         cfg.skip_fn(|_| true)
             .skip_static(|_| true)
@@ -4552,6 +4584,7 @@ fn test_linux_like_apis(target: &str) {
     if linux || android {
         // Test `ARPHRD_CAN`.
         let mut cfg = ctest_cfg();
+        config_gnu_time64(target, &mut cfg);
         cfg.header("linux/if_arp.h");
         cfg.skip_fn(|_| true)
             .skip_static(|_| true)