From 67cf3f5cf590549b1b8f8e2eb92ca20ed80d8a0a Mon Sep 17 00:00:00 2001 From: Eduardo Habkost Date: Wed, 11 Mar 2020 19:23:41 -0400 Subject: [PATCH] Use -isystem for linux-headers dir glibc and Linux-provided headers are known to generate macro redefinition warnings when used together. For example: and duplicate some macro definitions. We normally never see those warnings because GCC suppresses warnings generated by system headers. We carry our own copy of Linux header files, though, and this makes those warnings not be suppressed when glibc headers are included before Linux headers (e.g. if is included before ). Use -isystem instead of -I for linux-headers. This makes the compiler treat our linux-headers directory the same way it treats system-provided Linux headers, and suppress warnings generated by them. Signed-off-by: Eduardo Habkost Reviewed-by: Michael S. Tsirkin Signed-off-by: Paolo Bonzini --- Makefile.target | 2 +- configure | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/Makefile.target b/Makefile.target index 2d43dc586a..934a9f7431 100644 --- a/Makefile.target +++ b/Makefile.target @@ -12,7 +12,7 @@ endif $(call set-vpath, $(SRC_PATH):$(BUILD_DIR)) ifdef CONFIG_LINUX -QEMU_CFLAGS += -I../linux-headers +QEMU_CFLAGS += -isystem ../linux-headers endif QEMU_CFLAGS += -iquote .. -iquote $(SRC_PATH)/target/$(TARGET_BASE_ARCH) -DNEED_CPU_H diff --git a/configure b/configure index 44a70cfa8c..06fcd070fb 100755 --- a/configure +++ b/configure @@ -900,7 +900,7 @@ Linux) linux="yes" linux_user="yes" kvm="yes" - QEMU_INCLUDES="-I\$(SRC_PATH)/linux-headers -I$PWD/linux-headers $QEMU_INCLUDES" + QEMU_INCLUDES="-isystem \$(SRC_PATH)/linux-headers -isystem $PWD/linux-headers $QEMU_INCLUDES" supported_os="yes" libudev="yes" ;; -- 2.42.0