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* [dpdk-dev] [PATCH] Pass CC option when building kernel modules
@ 2014-10-06 15:57 Sergio Gonzalez Monroy
  2014-10-06 16:12 ` Bruce Richardson
                   ` (2 more replies)
  0 siblings, 3 replies; 8+ messages in thread
From: Sergio Gonzalez Monroy @ 2014-10-06 15:57 UTC (permalink / raw)
  To: dev

At least on kernels 3.15 or newer, DPDK build is broken for CLANG target.
The issue is that the kernel build system sets the flags before including
DPDK makefile and therefore assumes the incorrect compiler.

Signed-off-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
---
 mk/rte.module.mk               | 2 +-
 mk/target/generic/rte.vars.mk  | 2 ++
 mk/toolchain/clang/rte.vars.mk | 5 +----
 mk/toolchain/gcc/rte.vars.mk   | 1 +
 mk/toolchain/icc/rte.vars.mk   | 5 +----
 5 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/mk/rte.module.mk b/mk/rte.module.mk
index c4ca3fd..41c0d0f 100644
--- a/mk/rte.module.mk
+++ b/mk/rte.module.mk
@@ -78,7 +78,7 @@ build: _postbuild
 $(MODULE).ko: $(SRCS_LINKS)
 	@if [ ! -f $(notdir Makefile) ]; then ln -nfs $(SRCDIR)/Makefile . ; fi
 	@$(MAKE) -C $(RTE_KERNELDIR) M=$(CURDIR) O=$(RTE_KERNELDIR) \
-		CROSS_COMPILE=$(CROSS)
+		CC=$(KERNELCC) CROSS_COMPILE=$(CROSS)
 
 # install module in $(RTE_OUTPUT)/kmod
 $(RTE_OUTPUT)/kmod/$(MODULE).ko: $(MODULE).ko
diff --git a/mk/target/generic/rte.vars.mk b/mk/target/generic/rte.vars.mk
index 6020f20..74ff771 100644
--- a/mk/target/generic/rte.vars.mk
+++ b/mk/target/generic/rte.vars.mk
@@ -149,4 +149,6 @@ endif
 export CFLAGS
 export LDFLAGS
 
+else # ! ifeq ($(KERNELRELEASE),)
+CC = $(KERNELCC)
 endif
diff --git a/mk/toolchain/clang/rte.vars.mk b/mk/toolchain/clang/rte.vars.mk
index ee4f451..40cb389 100644
--- a/mk/toolchain/clang/rte.vars.mk
+++ b/mk/toolchain/clang/rte.vars.mk
@@ -38,11 +38,8 @@
 #   - define TOOLCHAIN_ASFLAGS variable (overriden by cmdline value)
 #
 
-ifeq ($(KERNELRELEASE),)
 CC        = $(CROSS)clang
-else
-CC        = $(CROSS)gcc
-endif
+KERNELCC  = $(CROSS)gcc
 CPP       = $(CROSS)cpp
 # for now, we don't use as but nasm.
 # AS      = $(CROSS)as
diff --git a/mk/toolchain/gcc/rte.vars.mk b/mk/toolchain/gcc/rte.vars.mk
index 262ebdf..993eb26 100644
--- a/mk/toolchain/gcc/rte.vars.mk
+++ b/mk/toolchain/gcc/rte.vars.mk
@@ -39,6 +39,7 @@
 #
 
 CC        = $(CROSS)gcc
+KERNELCC  = $(CROSS)gcc
 CPP       = $(CROSS)cpp
 # for now, we don't use as but nasm.
 # AS      = $(CROSS)as
diff --git a/mk/toolchain/icc/rte.vars.mk b/mk/toolchain/icc/rte.vars.mk
index 612370d..f03a2a2 100644
--- a/mk/toolchain/icc/rte.vars.mk
+++ b/mk/toolchain/icc/rte.vars.mk
@@ -41,11 +41,8 @@
 # Warning: we do not use CROSS environment variable as icc is mainly a
 # x86->x86 compiler
 
-ifeq ($(KERNELRELEASE),)
 CC        = icc
-else
-CC        = gcc
-endif
+KERNELCC  = gcc
 CPP       = cpp
 AS        = nasm
 AR        = ar
-- 
1.9.3

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2014-10-15 13:55 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-10-06 15:57 [dpdk-dev] [PATCH] Pass CC option when building kernel modules Sergio Gonzalez Monroy
2014-10-06 16:12 ` Bruce Richardson
2014-10-08 17:15 ` Thomas Monjalon
2014-10-09  8:10   ` Bruce Richardson
2014-10-09 10:04     ` Sergio Gonzalez Monroy
2014-10-09 10:08 ` [dpdk-dev] [PATCH v2] " Sergio Gonzalez Monroy
2014-10-13 16:08   ` De Lara Guarch, Pablo
2014-10-15 14:03     ` Thomas Monjalon

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