Pass OCVRS_TARGET_OS_WINDOWS from the build script

Author: twistedfall

binding-generator/src/settings/func_cfg_attr.rs

@@ -2,8 +2,8 @@ use std::collections::HashMap;
 
 use crate::func::FuncMatcher;
 
-pub const CFG_ATTR_NOT_ON_WINDOWS: (&str, &str) = ("not(target_os = \"windows\")", "!defined(OCVRS_TARGET_OS_WINDOWS)");
-pub const CFG_ATTR_ONLY_OPENCV_5: (&str, &str) = ("ocvrs_opencv_branch_5", "CV_VERSION_MAJOR == 5");
+pub const CFG_ATTR_NOT_ON_WINDOWS: (&str, &str) = (r#"not(target_os = "windows")"#, r#"(!OCVRS_TARGET_OS_WINDOWS)"#);
+pub const CFG_ATTR_ONLY_OPENCV_5: (&str, &str) = ("ocvrs_opencv_branch_5", "(CV_VERSION_MAJOR == 5)");
 
 pub type FuncCfgAttr = FuncMatcher<'static, (&'static str, &'static str)>;
 

build.rs

@@ -278,9 +278,18 @@ fn make_compiler(opencv: &Library, ffi_export_suffix: &str) -> cc::Build {
 		out.flag_if_supported("-Wa,-mbig-obj");
 	}
 	out.define("OCVRS_FFI_EXPORT_SUFFIX", ffi_export_suffix);
+	out.define("OCVRS_TARGET_OS_WINDOWS", target_os_windows());
 	out
 }
 
+fn target_os_windows() -> &'static str {
+	if env::var("CARGO_CFG_TARGET_OS").expect("Can't read CARGO_CFG_TARGET_OS env var") == "windows" {
+		"1"
+	} else {
+		"0"
+	}
+}
+
 fn setup_rerun() -> Result<()> {
 	for &v in AFFECTING_ENV_VARS.iter() {
 		println!("cargo::rerun-if-env-changed={v}");

src_cpp/ocvrs_common.hpp

@@ -18,11 +18,6 @@
 
 #include <opencv2/core.hpp>
 
-#if defined(_WIN32) || defined(_WIN64) || defined(__WIN32__) || defined(__TOS_WIN__) || defined(__WINDOWS__) \
- || defined(__CYGWIN__) || defined(__MINGW32__) || defined(__BORLANDC__)
-	#define OCVRS_TARGET_OS_WINDOWS
-#endif
-
 #define OCVRS_ONLY_DEPENDENT_TYPES
 
 #define OCVRS_HANDLE(code, msg, return_name) Err(code, msg, return_name)