From a3005fa1a62a88a94f2078ecff7b64c9fae1f6cd Mon Sep 17 00:00:00 2001
From: Shin Umeda <umeda.shin@gmail.com>
Date: Thu, 12 Feb 2026 20:13:47 -0800
Subject: [PATCH 1/3] add oslib option, fix crt0 flag

---
 prebuilt/conanfile.py | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/prebuilt/conanfile.py b/prebuilt/conanfile.py
index 004d7d7..c9f3c82 100644
--- a/prebuilt/conanfile.py
+++ b/prebuilt/conanfile.py
@@ -12,14 +12,21 @@ class PrebuiltGccPicolibc(ConanFile):
     package_type = "static-library"
     build_policy = "missing"
     options = {
+        "oslib": [
+            None,
+            "semihost",
+        ],
         "crt0": [
+            "default",
+            "none",
             "semihost",
             "hosted",
             "minimal",
         ]
     }
     default_options = {
-        "crt0": "semihost",
+        "oslib": None,
+        "crt0": "default",
     }
 
     def validate(self):
@@ -62,11 +69,17 @@ def package_info(self):
         PICOLIB_CPP_SPECS = Path(self.package_folder) / 'lib' / 'gcc' / \
             'arm-none-eabi' / LONG_VERSION / 'picolibcpp.specs'
 
-        self.cpp_info.exelinkflags = [
+        flags = [
             f"-specs={PICOLIB_CPP_SPECS}",
             f"--picolibc-prefix={PREFIX}",
-            f"--oslib={str(self.options.crt0)}",
+            f"--oslib={str(self.options.oslib)}",
         ]
+        if not self.options.crt0 == "default":
+            flags += f"--crt0={str(self.options.crt0)}"
+
+        self.cpp_info.exelinkflags = flags
+        self.cpp_info.cppflags = flags
+        self.cpp_info.cflags = flags
 
         self.output.info(f"link flags: {self.cpp_info.exelinkflags}")
         self.output.info(f"crt0: {str(self.options.crt0)}")

From 62b713fb2714aff39e48818d1d23a58d9b1fb3ec Mon Sep 17 00:00:00 2001
From: Shin Umeda <umeda.shin@gmail.com>
Date: Thu, 12 Feb 2026 20:20:58 -0800
Subject: [PATCH 2/3] fix oslib stringification

---
 prebuilt/conanfile.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/prebuilt/conanfile.py b/prebuilt/conanfile.py
index c9f3c82..188a09e 100644
--- a/prebuilt/conanfile.py
+++ b/prebuilt/conanfile.py
@@ -72,8 +72,10 @@ def package_info(self):
         flags = [
             f"-specs={PICOLIB_CPP_SPECS}",
             f"--picolibc-prefix={PREFIX}",
-            f"--oslib={str(self.options.oslib)}",
+         
         ]
+        if self.options.oslib is not None:
+            flags += f"--oslib={str(self.options.oslib)}"
         if not self.options.crt0 == "default":
             flags += f"--crt0={str(self.options.crt0)}"
 

From d5bdc379cdca64b48c17dc8e8d8b30c7271a4d61 Mon Sep 17 00:00:00 2001
From: Shin Umeda <umeda.shin@gmail.com>
Date: Thu, 12 Feb 2026 20:31:53 -0800
Subject: [PATCH 3/3] fix None comparison

---
 prebuilt/conanfile.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/prebuilt/conanfile.py b/prebuilt/conanfile.py
index 188a09e..4127bc4 100644
--- a/prebuilt/conanfile.py
+++ b/prebuilt/conanfile.py
@@ -74,10 +74,10 @@ def package_info(self):
             f"--picolibc-prefix={PREFIX}",
          
         ]
-        if self.options.oslib is not None:
-            flags += f"--oslib={str(self.options.oslib)}"
+        if self.options.oslib.value is not None:
+            flags += [f"--oslib={str(self.options.oslib)}"]
         if not self.options.crt0 == "default":
-            flags += f"--crt0={str(self.options.crt0)}"
+            flags += [f"--crt0={str(self.options.crt0)}"]
 
         self.cpp_info.exelinkflags = flags
         self.cpp_info.cppflags = flags