From 56593a4af7a7a98e14ffef2c037e4a48d65da1f2 Mon Sep 17 00:00:00 2001
From: Larry Knox <lrknox@hdfgroup.org>
Date: Wed, 9 Aug 2023 14:53:48 -0700
Subject: [PATCH] set H5_PAC_C_MAX_REAL_PRECISION default to 0 when cross
 compiling (#3365)

with CMake to fix Fortran build failures.
---
 config/cmake/ConfigureChecks.cmake | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

diff --git a/config/cmake/ConfigureChecks.cmake b/config/cmake/ConfigureChecks.cmake
index e5192f54496..4da401a8174 100644
--- a/config/cmake/ConfigureChecks.cmake
+++ b/config/cmake/ConfigureChecks.cmake
@@ -858,21 +858,23 @@ if (HDF5_BUILD_FORTRAN)
 
     list (GET PROG_OUTPUT4 0 H5_LDBL_DIG)
     list (GET PROG_OUTPUT4 1 H5_FLT128_DIG)
-  endif ()
 
-  if (${HDF_PREFIX}_SIZEOF___FLOAT128 EQUAL "0" OR FLT128_DIG EQUAL "0")
-    set (${HDF_PREFIX}_HAVE_FLOAT128 0)
-    set (${HDF_PREFIX}_SIZEOF___FLOAT128 0)
-    set (_PAC_C_MAX_REAL_PRECISION ${H5_LDBL_DIG})
+    if (${HDF_PREFIX}_SIZEOF___FLOAT128 EQUAL "0" OR FLT128_DIG EQUAL "0")
+      set (${HDF_PREFIX}_HAVE_FLOAT128 0)
+      set (${HDF_PREFIX}_SIZEOF___FLOAT128 0)
+      set (_PAC_C_MAX_REAL_PRECISION ${H5_LDBL_DIG})
+    else ()
+      set (_PAC_C_MAX_REAL_PRECISION ${H5_FLT128_DIG})
+    endif ()
+    if (NOT ${_PAC_C_MAX_REAL_PRECISION})
+      set (${HDF_PREFIX}_PAC_C_MAX_REAL_PRECISION 0)
+    else ()
+      set (${HDF_PREFIX}_PAC_C_MAX_REAL_PRECISION ${_PAC_C_MAX_REAL_PRECISION})
+    endif ()
+    message (STATUS "maximum decimal precision for C var - ${${HDF_PREFIX}_PAC_C_MAX_REAL_PRECISION}")
   else ()
-    set (_PAC_C_MAX_REAL_PRECISION ${H5_FLT128_DIG})
-  endif ()
-  if (NOT ${_PAC_C_MAX_REAL_PRECISION})
     set (${HDF_PREFIX}_PAC_C_MAX_REAL_PRECISION 0)
-  else ()
-    set (${HDF_PREFIX}_PAC_C_MAX_REAL_PRECISION ${_PAC_C_MAX_REAL_PRECISION})
   endif ()
-  message (STATUS "maximum decimal precision for C var - ${${HDF_PREFIX}_PAC_C_MAX_REAL_PRECISION}")
 
 endif()