Port configure.ac changes to configure.py.

Author: nascheme

Tools/configure/conf_buildopts.py

@@ -535,12 +535,14 @@ def setup_dtrace(v):
 def setup_perf_trampoline(v):
     """Check and configure perf trampoline support."""
     pyconf.checking("perf trampoline")
-    if v.PLATFORM_TRIPLET in (
-        "x86_64-linux-gnu",
-        "aarch64-linux-gnu",
-        "darwin",
-    ):
+    if v.PLATFORM_TRIPLET in ("x86_64-linux-gnu", "aarch64-linux-gnu"):
         perf_trampoline = True
+    elif v.PLATFORM_TRIPLET == "darwin":
+        target = v.get("MACOSX_DEPLOYMENT_TARGET", "")
+        if pyconf.fnmatch_any(target, ["10.[0-9]", "10.1[0-1]"]):
+            perf_trampoline = False
+        else:
+            perf_trampoline = True
     else:
         perf_trampoline = False
     pyconf.result(perf_trampoline)

Tools/configure/conf_compiler.py

@@ -558,6 +558,37 @@ def check_stdatomic(v):
             "Has builtin __atomic_load_n() and __atomic_store_n() functions",
         )
 
+    # Check for __builtin_shufflevector with 128-bit vector support on an
+    # architecture where it compiles to worthwhile native SIMD instructions.
+    # Used for SIMD-accelerated bytes.hex() in Python/pystrhex.c.
+    pyconf.checking("for __builtin_shufflevector")
+    ac_cv_efficient_builtin_shufflevector = pyconf.link_check(
+        source=(
+            "#if !defined(__x86_64__) && !defined(__aarch64__) && \\\n"
+            "    !(defined(__arm__) && defined(__ARM_NEON))\n"
+            '#  error "128-bit vector SIMD not worthwhile on this architecture"\n'
+            "#endif\n"
+            "typedef unsigned char v16u8 __attribute__((vector_size(16)));\n"
+            "int main(void) {\n"
+            "  v16u8 a = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};\n"
+            "  v16u8 b = {16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31};\n"
+            "  v16u8 c = __builtin_shufflevector(a, b,\n"
+            "      0, 16, 1, 17, 2, 18, 3, 19, 4, 20, 5, 21, 6, 22, 7, 23);\n"
+            "  (void)c;\n"
+            "  return 0;\n"
+            "}\n"
+        ),
+        cache_var="ac_cv_efficient_builtin_shufflevector",
+    )
+    pyconf.result(ac_cv_efficient_builtin_shufflevector)
+    if ac_cv_efficient_builtin_shufflevector:
+        pyconf.define(
+            "HAVE_EFFICIENT_BUILTIN_SHUFFLEVECTOR",
+            1,
+            "Define if compiler supports __builtin_shufflevector with 128-bit "
+            "vectors AND the target architecture has native SIMD",
+        )
+
 
 def check_sizes(v):
     """Check sizeof/alignof for fundamental types and pthread types."""

Tools/configure/conf_math.py

@@ -90,19 +90,11 @@ def _define_float_little():
 
 
 def _define_float_unknown():
-    if "arm" in pyconf.host_cpu:
-        pyconf.define(
-            "DOUBLE_IS_ARM_MIXED_ENDIAN_IEEE754",
-            1,
-            "Define if C doubles are 64-bit IEEE 754 binary format, "
-            "stored in ARM mixed-endian order (byte order 45670123)",
-        )
-    else:
-        pyconf.error(
-            "Unknown float word ordering. You need to manually "
-            "preset ax_cv_c_float_words_bigendian=no (or yes) "
-            "according to your system."
-        )
+    pyconf.error(
+        "Unknown float word ordering. You need to manually "
+        "preset ax_cv_c_float_words_bigendian=no (or yes) "
+        "according to your system."
+    )
 
 
 def check_gcc_asm_and_floating_point(v):

Tools/configure/conf_optimization.py

@@ -230,7 +230,10 @@ def setup_pgo_flags(v):
                     "build but could not be found."
                 )
     elif v.ac_cv_cc_name == "gcc":
-        v.PGO_PROF_GEN_FLAG = "-fprofile-generate"
+        if pyconf.check_compile_flag("-fprofile-update=atomic"):
+            v.PGO_PROF_GEN_FLAG = "-fprofile-generate -fprofile-update=atomic"
+        else:
+            v.PGO_PROF_GEN_FLAG = "-fprofile-generate"
         v.PGO_PROF_USE_FLAG = "-fprofile-use -fprofile-correction"
         v.LLVM_PROF_MERGER = "true"
         v.LLVM_PROF_FILE = ""

Tools/configure/conf_platform.py

@@ -927,7 +927,6 @@ def check_headers(v):
         "shadow.h",
         "signal.h",
         "spawn.h",
-        "stropts.h",
         "sys/audioio.h",
         "sys/bsdtty.h",
         "sys/devpoll.h",
@@ -975,6 +974,25 @@ def check_headers(v):
         "utime.h",
         "utmp.h",
     )
+    # On Linux, stropts.h may be empty
+    pyconf.checking("whether stropts.h has I_PUSH")
+    has_i_push = pyconf.compile_check(
+        preamble=(
+            "#ifdef HAVE_SYS_TYPES_H\n"
+            "#  include <sys/types.h>\n"
+            "#endif\n"
+            "#include <stropts.h>\n"
+        ),
+        body="(void)I_PUSH",
+    )
+    pyconf.result(has_i_push)
+    if has_i_push:
+        pyconf.define(
+            "HAVE_STROPTS_H",
+            1,
+            "Define to 1 if you have the <stropts.h> header file.",
+        )
+
     # AC_HEADER_DIRENT: check for dirent.h
     pyconf.check_headers("dirent.h")
 

Tools/configure/conf_wasm.py

@@ -83,6 +83,7 @@ def setup_wasm_flags(v):
     v.export("CFLAGS_NODIST")
     v.export("LDFLAGS_NODIST")
     v.export("LDFLAGS_NOLTO")
+    v.export("EXE_LDFLAGS")
     v.export("LINKFORSHARED")
     v.export("WASM_ASSETS_DIR")
     v.export("WASM_STDLIB")
@@ -104,7 +105,8 @@ def _setup_emscripten_flags(v):
     )
     v.LINKFORSHARED += (
         " -sEXPORTED_FUNCTIONS=_main,_Py_Version,__PyRuntime,"
-        "_PyGILState_GetThisThreadState,__Py_DumpTraceback"
+        "_PyGILState_GetThisThreadState,__Py_DumpTraceback,"
+        "__PyEM_EMSCRIPTEN_TRAMPOLINE_OFFSET"
     )
     v.LINKFORSHARED += " -sSTACK_SIZE=5MB"
     v.LINKFORSHARED += " -sTEXTDECODER=2"