Fix IntelDFP to not require Git

Don't BuildRequires git, and just use 'patch' on
the IntelDFP sources if possible.

(cherry picked from commit 76e08d8)

Author: vector-of-bool

.evergreen/config.yml

@@ -845,6 +845,10 @@ tasks:
         content_type: '${content_type|application/x-gzip}'
 
 - name: debian-package-build
+  run_on: &deb-package-build-run_on
+    - ubuntu2004
+    - ubuntu2004-small
+  tags: [packaging]
   commands:
     - func: "fetch source"
     - command: shell.exec
@@ -868,6 +872,8 @@ tasks:
         display_name: "deb.tar.gz"
 
 - name: debian-package-build-i386
+  run_on: *deb-package-build-run_on
+  tags: [packaging]
   commands:
     - func: "fetch source"
     - command: shell.exec
@@ -1369,10 +1375,7 @@ buildvariants:
     - "publish-java"
 - name: packaging
   display_name: "Linux Distro Packaging"
-  run_on: ubuntu2004-small
-  tasks:
-  - name: debian-package-build
-  - name: debian-package-build-i386
+  tasks: [.packaging]
 - name: macos
   display_name: macOS m1 (Apple LLVM)
   run_on: macos-1100-arm64

cmake/IntelDFP.cmake

@@ -1,6 +1,7 @@
 
 include (FetchContent)
 find_program (GIT_EXECUTABLE git)
+find_program (PATCH_EXECUTABLE patch)
 
 set (_default_url "${PROJECT_SOURCE_DIR}/third-party/IntelRDFPMathLib20U2.tar.xz")
 
@@ -18,9 +19,13 @@ if (NOT INTEL_DFP_LIBRARY_URL_SHA256 STREQUAL "no-verify")
 endif ()
 
 # Make the PATCH_COMMAND a no-op if it was disabled
-set (_patch_disabler)
+set (patch_command)
 if (NOT INTEL_DFP_LIBRARY_PATCH_ENABLED)
-    set (_patch_disabler "${CMAKE_COMMAND}" -E true)
+    set (patch_command "${CMAKE_COMMAND}" -E true)
+elseif (GIT_EXECUTABLE)
+    set (patch_command "${GIT_EXECUTABLE}" --work-tree=<SOURCE_DIR> apply)
+else ()
+    set (patch_command "${PATCH_EXECUTABLE}" --dir=<SOURCE_DIR>)
 endif ()
 
 # NOTE: The applying of the patch expects the correct input directly from the
@@ -33,8 +38,7 @@ FetchContent_Declare (
     URL "${_default_url}"
     ${_hash_arg}
     PATCH_COMMAND
-        ${_patch_disabler}
-        "${GIT_EXECUTABLE}" --work-tree=<SOURCE_DIR> apply
+        ${patch_command}
             -p 4 # Strip four path components
             "${PROJECT_SOURCE_DIR}/etc/mongo-inteldfp-s390x.patch"
             --verbose

etc/rpm/tweak.awk

@@ -10,8 +10,7 @@
 
 # Replace the autosetup with one that copies the source tree into place
 /%autosetup/ {
-    print "cd %{_topdir}/BUILD\n" \
-          "cp -rf %{_sourcedir}/. $PWD\n" \
+    print "cp -rf %{_sourcedir}/. %{_builddir}/\n" \
           "%autopatch 0 -p1"
     next
 }