CMake: Support older CMake for checking file sizes

1 files changed, 9 insertions, 2 deletions

diff --git a/Embed.cmake b/Embed.cmake
index ce2c5ff8..4d51f418 100644
--- a/Embed.cmake
+++ b/Embed.cmake
@@ -47,6 +47,13 @@ const iBlock ${name} = { &data_${name}_ };
     file (APPEND ${fnHeader} "${header}")
 endfunction (embed_write)
 
+function (embed_filesize path sizeVar)
+    file (READ ${path} data HEX)
+    string (LENGTH ${data} fsize)
+    math (EXPR fsize "${fsize}/2")
+    set (${sizeVar} ${fsize} PARENT_SCOPE)
+endfunction (embed_filesize)
+
 function (embed_make)
     set (EMB_H ${CMAKE_CURRENT_BINARY_DIR}/embedded.h)
     set (EMB_C ${CMAKE_CURRENT_BINARY_DIR}/embedded.c)
@@ -85,7 +92,7 @@ function (embed_make)
             set (offsets)
             set (fpos 0)
             foreach (fn ${ARGV})
-                file (SIZE ${CMAKE_SOURCE_DIR}/${fn} fileSize)
+                embed_filesize (${CMAKE_SOURCE_DIR}/${fn} fileSize)
                 list (APPEND offsets "${fpos}")
                 math (EXPR fpos "${fpos} + ${fileSize}")
             endforeach (fn)
@@ -108,7 +115,7 @@ static const iEmbedChunk chunks_Embed_[] = {
 ]])
             set (index 0)
             foreach (fn ${ARGV})
-                file (SIZE ${CMAKE_SOURCE_DIR}/${fn} fileSize)
+                embed_filesize (${CMAKE_SOURCE_DIR}/${fn} fileSize)
                 list (GET offsets ${index} fpos)
                 file (APPEND ${EMB_C} "    { ${fpos}, ${fileSize} },\n")
                 math (EXPR index "${index} + 1")