Patch from:
https://github.com/ccache/ccache/commit/71f772e9d3d4f8045cfa7bccd03bd21c1e8fbef1

From db136b6819d95bb53582e4fea8c328029c8f5681 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Holger=20Hoffst=C3=A4tte?= <holger@applied-asynchrony.com>
Date: Tue, 2 Jul 2024 12:53:04 +0200
Subject: [PATCH] build: Try harder to determine FMT_VERSION

fmt-11.0 moved the FMT_VERSION from core.h to base.h, so try the
new header first and then fall back to the old one.

Closes: #1477
---
 cmake/FindFmt.cmake | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/cmake/FindFmt.cmake b/cmake/FindFmt.cmake
index 55126a3172..0619f4615e 100644
--- a/cmake/FindFmt.cmake
+++ b/cmake/FindFmt.cmake
@@ -3,11 +3,19 @@ mark_as_advanced(FMT_INCLUDE_DIR FMT_LIBRARY)
 if(DEP_FMT STREQUAL "BUNDLED")
   message(STATUS "Using bundled Fmt as requested")
 else()
-  find_path(FMT_INCLUDE_DIR fmt/core.h)
+  find_path(FMT_INCLUDE_DIR fmt/base.h fmt/core.h)
   find_library(FMT_LIBRARY fmt)
   if(FMT_INCLUDE_DIR AND FMT_LIBRARY)
-    file(READ "${FMT_INCLUDE_DIR}/fmt/core.h" _fmt_core_h)
-    string(REGEX MATCH "#define FMT_VERSION ([0-9]+)" _ "${_fmt_core_h}")
+    file(READ "${FMT_INCLUDE_DIR}/fmt/base.h" _fmt_base_h)
+    string(REGEX MATCH "#define FMT_VERSION ([0-9]+)" _ "${_fmt_base_h}")
+    if("${CMAKE_MATCH_0}" STREQUAL "")
+      file(READ "${FMT_INCLUDE_DIR}/fmt/core.h" _fmt_core_h)
+      string(REGEX MATCH "#define FMT_VERSION ([0-9]+)" _ "${_fmt_core_h}")
+    endif()
+    if("${CMAKE_MATCH_0}" STREQUAL "")
+      message(FATAL_ERROR "FMT_VERSION not found")
+      return()
+    endif()
     math(EXPR _fmt_major "${CMAKE_MATCH_1} / 10000")
     math(EXPR _fmt_minor "${CMAKE_MATCH_1} / 100 % 100")
     math(EXPR _fmt_patch "${CMAKE_MATCH_1} % 100")

Patch from:
https://github.com/ccache/ccache/commit/3b09afc5f792f0bd0a15cf6b8408ea40eb069787

From 3b09afc5f792f0bd0a15cf6b8408ea40eb069787 Mon Sep 17 00:00:00 2001
From: Joel Rosdahl <joel@rosdahl.net>
Date: Tue, 2 Jul 2024 17:05:43 +0200
Subject: [PATCH] build: Fix detection of Fmt version for Fmt<11

Fixes regression in 71f772e9d3d4f8045cfa7bccd03bd21c1e8fbef1.
---
 cmake/FindFmt.cmake | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/cmake/FindFmt.cmake b/cmake/FindFmt.cmake
index 0619f4615e..7c39291eca 100644
--- a/cmake/FindFmt.cmake
+++ b/cmake/FindFmt.cmake
@@ -3,15 +3,16 @@ mark_as_advanced(FMT_INCLUDE_DIR FMT_LIBRARY)
 if(DEP_FMT STREQUAL "BUNDLED")
   message(STATUS "Using bundled Fmt as requested")
 else()
-  find_path(FMT_INCLUDE_DIR fmt/base.h fmt/core.h)
+  find_path(FMT_INCLUDE_DIR NAMES fmt/base.h fmt/core.h)
   find_library(FMT_LIBRARY fmt)
   if(FMT_INCLUDE_DIR AND FMT_LIBRARY)
-    file(READ "${FMT_INCLUDE_DIR}/fmt/base.h" _fmt_base_h)
-    string(REGEX MATCH "#define FMT_VERSION ([0-9]+)" _ "${_fmt_base_h}")
-    if("${CMAKE_MATCH_0}" STREQUAL "")
-      file(READ "${FMT_INCLUDE_DIR}/fmt/core.h" _fmt_core_h)
-      string(REGEX MATCH "#define FMT_VERSION ([0-9]+)" _ "${_fmt_core_h}")
+    if(EXISTS "${FMT_INCLUDE_DIR}/fmt/base.h")
+      set(_fmt_h base.h)
+    else()
+      set(_fmt_h core.h)
     endif()
+    file(READ "${FMT_INCLUDE_DIR}/fmt/${_fmt_h}" _fmt_h_content)
+    string(REGEX MATCH "#define FMT_VERSION ([0-9]+)" _ "${_fmt_h_content}")
     if("${CMAKE_MATCH_0}" STREQUAL "")
       message(FATAL_ERROR "FMT_VERSION not found")
       return()