--- SConstruct	2023-06-16 20:55:56.000000000 +0800
+++ SConstruct	2024-04-09 15:23:59.000000000 +0800
@@ -1416,6 +1416,8 @@
     'aarch64'    : { 'endian': 'little', 'check': '(defined(__arm64__) || defined(__aarch64__))' },
     'emscripten' : { 'endian': 'little', 'check': '(defined(__EMSCRIPTEN__))' },
     'ppc64le'    : { 'endian': 'little', 'check': '(defined(__powerpc64__))' },
+    'ppc64'      : { 'endian': 'big', 'check': '(defined(__ppc64__))' },
+    'ppc'        : { 'endian': 'big', 'check': '(defined(__ppc__))' },
     'riscv64'    : { 'endian': 'little', 'check': '(defined(__riscv)) && (__riscv_xlen == 64)' },
     's390x'      : { 'endian': 'big',    'check': '(defined(__s390x__))' },
     'x86_64'     : { 'endian': 'little', 'check': '(defined(__x86_64) || defined(_M_AMD64))' },
@@ -2491,9 +2493,7 @@
             )
 
     # -Winvalid-pch Warn if a precompiled header (see Precompiled Headers) is found in the search path but can't be used.
-    env.Append( CCFLAGS=["-fasynchronous-unwind-tables",
-                         "-ggdb" if not env.TargetOSIs('emscripten') else "-g",
-                         "-Wall",
+    env.Append( CCFLAGS=["-Wall",
                          "-Wsign-compare",
                          "-Wno-unknown-pragmas",
                          "-Winvalid-pch"] )
@@ -2663,6 +2663,8 @@
         "aarch64"    : { "-march=" : "armv8.2-a",    "-mtune=" : "generic"                        },
         "i386"       : { "-march=" : "nocona",       "-mtune=" : "generic"                        },
         "ppc64le"    : { "-mcpu="  : "power8",       "-mtune=" : "power8", "-mcmodel=" : "medium" },
+        "ppc64"      : {                             "-mtune=" : "970"                            },
+        "ppc"        : {                             "-mtune=" : "native"                         },
         "s390x"      : { "-march=" : "z196",         "-mtune=" : "zEC12"                          },
     }
 
@@ -4564,6 +4566,8 @@
     # the compiler can actualy do for us.
     extended_alignment_search_sequence = {
         'ppc64le' : [ 128, 64, 32 ],
+        'ppc64' : [ 128, 64, 32 ],
+        'ppc' : [ 128, 64, 32 ],
         's390x' : [ 256, 128, 64, 32 ],
     }
 
@@ -4632,6 +4636,8 @@
     if (free_monitoring == "on") and (http_client == "off"):
         env.ConfError("FreeMonitoring requires an HTTP client which has been explicitly disabled")
 
+    # What is called Altivec below seems misleading, as it checks for VSX instead.
+    # Will not be useful then.
     if env['TARGET_ARCH'] == "ppc64le":
         # This checks for an altivec optimization we use in full text search.
         # Different versions of gcc appear to put output bytes in different