bcc: CMakeLists.txt: don't modify .gitconfig on build host nor try to update git submodules

* bitbake fetcher will correctly handle safe.directory issues and
  blazesym or libbpf submodules are managed by gitsm:// fetcher
  we don't want to call git from CMake in do_configure

* prevents many safe.directory entries in users .gitconfig when
  bcc was built in many different TMPDIRs

  added in https://github.com/iovisor/bcc/pull/4186

  causing:
  [safe]
        directory = /OE/build/oe-core/tmp-glibc/work/cortexa57-oe-linux/bcc/0.28.0+git/git
        directory = /OE/build/oe-core/tmp-glibc/work/cortexa57-oe-linux/bcc/0.28.0+git/git/libbpf-tools/blazesym

  to be added for every TMPDIR where it was built

Signed-off-by: Martin Jansa <martin.jansa@gmail.com>

2 files changed, 90 insertions, 0 deletions

diff --git a/dynamic-layers/meta-python/recipes-devtools/bcc/bcc/0001-CMakeLists.txt-don-t-modify-.gitconfig-on-build-host.patch b/dynamic-layers/meta-python/recipes-devtools/bcc/bcc/0001-CMakeLists.txt-don-t-modify-.gitconfig-on-build-host.patch
new file mode 100644
index 0000000..1484b6a
--- /dev/null
+++ b/dynamic-layers/meta-python/recipes-devtools/bcc/bcc/0001-CMakeLists.txt-don-t-modify-.gitconfig-on-build-host.patch
@@ -0,0 +1,89 @@
+From 9ee5d9ca2e1ea709571613326b81e8e651fa9f00 Mon Sep 17 00:00:00 2001
+From: Martin Jansa <martin.jansa@gmail.com>
+Date: Thu, 7 Sep 2023 11:43:25 +0200
+Subject: [PATCH] CMakeLists.txt: don't modify .gitconfig on build host nor try
+ to update git submodules
+
+* bitbake fetcher will correctly handle safe.directory issues and
+  blazesym or libbpf submodules are managed by gitsm:// fetcher
+  we don't want to call git from CMake in do_configure
+
+Upstream-Status: Pending
+Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
+---
+ CMakeLists.txt | 62 --------------------------------------------------
+ 1 file changed, 62 deletions(-)
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index dfed06e5..ffd88043 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -26,68 +26,6 @@ endif()
+ 
+ enable_testing()
+ 
+-execute_process(COMMAND git config --global --add safe.directory ${CMAKE_CURRENT_SOURCE_DIR}
+-                WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+-                RESULT_VARIABLE CONFIG_RESULT)
+-if(CONFIG_RESULT AND NOT CONFIG_RESULT EQUAL 0)
+-  message(WARNING "Failed to add root source directory to safe.directory")
+-endif()
+-
+-# populate submodule blazesym
+-if(NOT NO_BLAZESYM)
+-  execute_process(COMMAND git config --global --add safe.directory ${CMAKE_CURRENT_SOURCE_DIR}/libbpf-tools/blazesym
+-                  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+-                  RESULT_VARIABLE CONFIG_RESULT)
+-  if(CONFIG_RESULT AND NOT CONFIG_RESULT EQUAL 0)
+-    message(WARNING "Failed to add blazesym source directory to safe.directory")
+-  endif()
+-
+-  execute_process(COMMAND git submodule update --init --recursive -- libbpf-tools/blazesym
+-                  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+-                  RESULT_VARIABLE UPDATE_RESULT)
+-  if(UPDATE_RESULT AND NOT UPDATE_RESULT EQUAL 0)
+-    message(WARNING "Failed to update submodule blazesym")
+-  endif()
+-endif()
+-
+-# populate submodules (libbpf)
+-if(NOT CMAKE_USE_LIBBPF_PACKAGE)
+-  execute_process(COMMAND git config --global --add safe.directory ${CMAKE_CURRENT_SOURCE_DIR}/src/cc/libbpf
+-                  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+-                  RESULT_VARIABLE CONFIG_RESULT)
+-  if(CONFIG_RESULT AND NOT CONFIG_RESULT EQUAL 0)
+-    message(WARNING "Failed to add libbpf source directory to safe.directory")
+-  endif()
+-  execute_process(COMMAND git config --global --add safe.directory ${CMAKE_CURRENT_SOURCE_DIR}/libbpf-tools/bpftool
+-                  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+-                  RESULT_VARIABLE CONFIG_RESULT)
+-  if(CONFIG_RESULT AND NOT CONFIG_RESULT EQUAL 0)
+-    message(WARNING "Failed to add bpftool source directory to safe.directory")
+-  endif()
+-
+-  if(NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/src/cc/libbpf/src)
+-    execute_process(COMMAND git submodule update --init --recursive
+-                    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+-                    RESULT_VARIABLE UPDATE_RESULT)
+-    if(UPDATE_RESULT AND NOT UPDATE_RESULT EQUAL 0)
+-      message(WARNING "Failed to update submodule libbpf")
+-    endif()
+-  else()
+-    execute_process(COMMAND git diff --shortstat ${CMAKE_CURRENT_SOURCE_DIR}/src/cc/libbpf/
+-                    OUTPUT_VARIABLE DIFF_STATUS)
+-    if("${DIFF_STATUS}" STREQUAL "")
+-      execute_process(COMMAND git submodule update --init --recursive
+-                      WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+-                      RESULT_VARIABLE UPDATE_RESULT)
+-      if(UPDATE_RESULT AND NOT UPDATE_RESULT EQUAL 0)
+-        message(WARNING "Failed to update submodule libbpf")
+-      endif()
+-    else()
+-      message(WARNING "submodule libbpf dirty, so no sync")
+-    endif()
+-  endif()
+-endif()
+-
+ # It's possible to use other kernel headers with
+ # KERNEL_INCLUDE_DIRS build variable, like:
+ #  $ cd <kernel-dir>
diff --git a/dynamic-layers/meta-python/recipes-devtools/bcc/bcc_0.28.0.bb b/dynamic-layers/meta-python/recipes-devtools/bcc/bcc_0.28.0.bb
index 105995d..230c4de 100644
--- a/dynamic-layers/meta-python/recipes-devtools/bcc/bcc_0.28.0.bb
+++ b/dynamic-layers/meta-python/recipes-devtools/bcc/bcc_0.28.0.bb
@@ -30,6 +30,7 @@ SRC_URI = "gitsm://github.com/iovisor/bcc;branch=master;protocol=https \
            file://0001-CMakeLists.txt-override-the-PY_CMD_ESCAPED.patch \
            file://0001-Vendor-just-enough-extra-headers-to-allow-libbpf-to-.patch \
            file://0001-tests-cc-Use-c-14-standard.patch \
+           file://0001-CMakeLists.txt-don-t-modify-.gitconfig-on-build-host.patch \
            file://run-ptest \
            file://ptest_wrapper.sh \
            "