Fix boost build failures on newer glibc

var/spack/repos/builtin/packages/boost/package.py

@@ -310,6 +310,10 @@ def libs(self):
           when="@1.77.0",
           working_dir="tools/build")
 
+    # Fix issues with PTHREAD_STACK_MIN not being a DEFINED constant in newer glibc
+    # See https:://github.com/spack/spack/issues/28273
+    patch("pthread-stack-min-fix.patch", when="@1.69.0:1.73.0")
+
     def patch(self):
         # Disable SSSE3 and AVX2 when using the NVIDIA compiler
         if self.spec.satisfies('%nvhpc'):

var/spack/repos/builtin/packages/boost/pthread-stack-min-fix.patch

@@ -0,0 +1,15 @@
+Taken from https://github.com/conan-io/conan-center-index/pull/361/files
+
+diff --git a/include/boost/thread/pthread/thread_data.hpp b/include/boost/thread/pthread/thread_data.hpp
+index aefbeb4..bc9b136 100644
+--- a/boost/thread/pthread/thread_data.hpp
++++ b/boost/thread/pthread/thread_data.hpp
+@@ -57,7 +57,7 @@ namespace boost
+ #else
+           std::size_t page_size = ::sysconf( _SC_PAGESIZE);
+ #endif
+-#if PTHREAD_STACK_MIN > 0
++#ifdef PTHREAD_STACK_MIN
+           if (size<PTHREAD_STACK_MIN) size=PTHREAD_STACK_MIN;
+ #endif
+           size = ((size+page_size-1)/page_size)*page_size;