Build libpressio for libpressio-sys

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "libpressio-sys/libpressio"]
 	path = libpressio-sys/libpressio
 	url = https://github.com/robertu94/libpressio.git
+[submodule "libpressio-sys/std_compat"]
+	path = libpressio-sys/std_compat
+	url = https://github.com/robertu94/std_compat

libpressio-sys/build.rs

@@ -7,12 +7,38 @@ fn main() {
     println!("cargo::rerun-if-changed=build.rs");
     println!("cargo::rerun-if-changed=wrapper.h");
     println!("cargo::rerun-if-changed=libpressio");
+    println!("cargo::rerun-if-changed=std_compat");
 
+    // ---------------------------------------------------------
+    // Configure std_compat, the compiler portability layer
+    // ---------------------------------------------------------
+    let mut stdcompat_config = cmake::Config::new("std_compat");
+    //prefer static libraries for RUST
+    stdcompat_config.define("BUILD_SHARED_LIBS", "OFF");
+    //disable testing to avoid google-test dependency
+    stdcompat_config.define("BUILD_TESTING", "OFF");
+    // require a C++17 compiler (e.g. gcc 12 or later) for now
+    // this includes Ubuntu 24.04 and later, Fedora, Nyx, et al 
+    // https://robertu94.github.io/guides/dependencies
+    stdcompat_config.define("STDCOMPAT_CXX_VERSION", "17");
+    stdcompat_config.define("STDCOMPAT_CXX_UNSTABLE", "ON");
+    stdcompat_config.define("STD_COMPAT_BOOST_REQUIRED", "OFF");
+    let stdcompat_out = stdcompat_config.build();
+    println!("cargo:rustc-link-search=native={}", stdcompat_out.display());
+
+    // ---------------------------------------------------------
+    // Configure libpressio
+    // ---------------------------------------------------------
     let mut config = cmake::Config::new("libpressio");
-    let out = config.build();
+    config.define("BUILD_SHARED_LIBS", "OFF");
+    config.define("BUILD_TESTING", "OFF");
+    config.define("LIBPRESSIO_HAS_OPENMP", "ON");
+    config.define("CMAKE_PREFIX_PATH", stdcompat_out);
+    let libpressio_out = config.build();
 
-    println!("cargo:rustc-link-search=native={}", out.display());
+    println!("cargo:rustc-link-search=native={}", libpressio_out.join("lib64").display());
     println!("cargo:rustc-link-lib=static=libpressio");
+    eprintln!("include dir {}", libpressio_out.join("include").display());
 
     let cargo_callbacks = bindgen::CargoCallbacks::new();
     let bindings = bindgen::Builder::default()
@@ -21,7 +47,7 @@ fn main() {
         .clang_arg("-std=c++11")
         .clang_arg(format!(
             "-I{}",
-            Path::new("libpressio").join("include").display()
+            libpressio_out.join("include").join("libpressio").display()
         ))
         .header("wrapper.h")
         .parse_callbacks(Box::new(cargo_callbacks))