[libc] Make errno asserts noop on gpu targets (#166606)

This patch defines errno unit and integration test asserts as noop on
GPU targets. Checking for errnos is tests has caused build breakages in
previous patches.

libc/test/IntegrationTest/CMakeLists.txt

@@ -14,5 +14,6 @@ add_object_library(
     libc.hdr.stdint_proxy
     libc.src.__support.OSUtil.osutil
     libc.src.__support.CPP.atomic
+    libc.src.__support.macros.properties.architectures
     ${arch_specific_deps}
 )

libc/test/IntegrationTest/test.h

@@ -11,6 +11,7 @@
 
 #include "src/__support/OSUtil/exit.h"
 #include "src/__support/OSUtil/io.h"
+#include "src/__support/macros/properties/architectures.h"
 
 #define __AS_STRING(val) #val
 #define __CHECK_TRUE(file, line, val, should_exit)                             \
@@ -68,9 +69,15 @@
 ////////////////////////////////////////////////////////////////////////////////
 // Errno checks.
 
+#ifdef LIBC_TARGET_ARCH_IS_GPU
+#define ASSERT_ERRNO_EQ(VAL)
+#define ASSERT_ERRNO_SUCCESS()
+#define ASSERT_ERRNO_FAILURE()
+#else
 #define ASSERT_ERRNO_EQ(VAL) ASSERT_EQ(VAL, static_cast<int>(errno))
 #define ASSERT_ERRNO_SUCCESS() ASSERT_EQ(0, static_cast<int>(errno))
 #define ASSERT_ERRNO_FAILURE() ASSERT_NE(0, static_cast<int>(errno))
+#endif
 
 // Integration tests are compiled with -ffreestanding which stops treating
 // the main function as a non-overloadable special function. Hence, we use a

libc/test/UnitTest/CMakeLists.txt

@@ -204,5 +204,6 @@ add_header_library(
     ErrnoCheckingTest.h
   DEPENDS
     libc.src.__support.common
+    libc.src.__support.macros.properties.architectures
     libc.src.errno.errno
 )

libc/test/UnitTest/ErrnoCheckingTest.h

@@ -11,11 +11,17 @@
 
 #include "src/__support/libc_errno.h"
 #include "src/__support/macros/config.h"
+#include "src/__support/macros/properties/architectures.h"
 #include "test/UnitTest/Test.h"
 
 // Define macro to validate the value stored in the errno and restore it
 // to zero.
 
+#ifdef LIBC_TARGET_ARCH_IS_GPU
+#define ASSERT_ERRNO_EQ(VAL)
+#define ASSERT_ERRNO_SUCCESS()
+#define ASSERT_ERRNO_FAILURE()
+#else
 #define ASSERT_ERRNO_EQ(VAL)                                                   \
   do {                                                                         \
     ASSERT_EQ(VAL, static_cast<int>(libc_errno));                              \
@@ -27,6 +33,7 @@
     ASSERT_NE(0, static_cast<int>(libc_errno));                                \
     libc_errno = 0;                                                            \
   } while (0)
+#endif
 
 namespace LIBC_NAMESPACE_DECL {
 namespace testing {