File emscripten-cflags.patch of Package nodejs-vscode-oniguruma

--- a/tools/system_libs.py
+++ b/tools/system_libs.py
@@ -50,7 +50,7 @@ def get_base_cflags(force_object_files=F
     flags += ['-sRELOCATABLE']
   if settings.MEMORY64:
     flags += ['-Wno-experimental', '-sMEMORY64=' + str(settings.MEMORY64)]
-  return flags
+  return flags + os.environ['CFLAGS'].split()
 
 
 def clean_env():
@@ -59,7 +59,7 @@ def clean_env():
   # At least one port also uses autoconf (harfbuzz) so we also need to clear
   # CFLAGS/LDFLAGS which we don't want to effect the inner call to configure.
   safe_env = os.environ.copy()
-  for opt in ['CFLAGS', 'CXXFLAGS', 'LDFLAGS',
+  for opt in [
               'EMCC_CFLAGS',
               'EMCC_FORCE_STDLIBS',
               'EMCC_ONLY_FORCED_STDLIBS',
@@ -178,7 +178,7 @@ class Library:
   # extra code size. The -fno-unroll-loops flags was added here when loop
   # unrolling landed upstream in LLVM to avoid changing behavior but was not
   # specifically evaluated.
-  cflags = ['-O2', '-Werror', '-fno-unroll-loops']
+  cflags = os.environ['CFLAGS'].split()
 
   # A list of directories to put in the include path when building.
   # This is a list of tuples of path components.
@@ -1003,7 +1003,7 @@ class libc(MuslInternalLibrary,
     return libc_files
 
   def customize_build_cmd(self, cmd, filename):
-    if filename in self.non_lto_files:
+    if filename.endswith('/sqrtl.c'):
       # These files act more like the part of compiler-rt in that
       # references to them can be generated at compile time.
       # Treat them like compiler-rt in as much as never compile
@@ -1011,8 +1011,7 @@ class libc(MuslInternalLibrary,
       # use used for the rest of libc) because this set of files
       # also contains performance sensitive math functions.
-      cmd = [a for a in cmd if not a.startswith('-flto')]
-      cmd = [a for a in cmd if not a.startswith('-O')]
-      cmd += ['-O2']
+      # this file crashes the compiler otherwise
+      cmd = [a for a in cmd if not a.startswith('-fstack-protector')]
     return cmd
 
 
@@ -1055,11 +1053,9 @@ class libc_optz(libc):
     return libcall_files + mem_files
 
   def customize_build_cmd(self, cmd, filename):
-    if filename in self.non_lto_files:
+    if filename.endswith('/sqrtl.c'):
       # see comments in libc.customize_build_cmd
-      cmd = [a for a in cmd if not a.startswith('-flto')]
-      cmd = [a for a in cmd if not a.startswith('-O')]
-      cmd += ['-O2']
+      cmd = [a for a in cmd if not a.startswith('-fstack-protector')]
     return cmd
 
   def can_use(self):