| Message ID | 152599606288.49950.18061098495140664365.stgit@djiang5-desk3.ch.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, 2018-05-10 at 16:47 -0700, Dave Jiang wrote: > Compiler spits out warning with -D_FORTIFY_SOURCE=2 and -O0. Moving to > -O2 > to remove warnings. > > Signed-off-by: Dave Jiang <dave.jiang@intel.com> > --- > README.md | 2 +- > autogen.sh | 2 +- > 2 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/README.md b/README.md > index 899dcbb8..e0bc5b7b 100644 > --- a/README.md > +++ b/README.md > @@ -6,7 +6,7 @@ sub-system in the Linux kernel > Build > ===== > `./autogen.sh` > -`./configure CFLAGS='-g -O0' --prefix=/usr --sysconfdir=/etc -- > libdir=/usr/lib64` > +`./configure CFLAGS='-g -O2' --prefix=/usr --sysconfdir=/etc -- > libdir=/usr/lib64` > `make` > `make check` > `sudo make install` > diff --git a/autogen.sh b/autogen.sh > index a23cf53c..2a52688b 100755 > --- a/autogen.sh > +++ b/autogen.sh > @@ -24,5 +24,5 @@ echo "------------------------------------------------- > ---------------" > echo "Initialized build system. For a common configuration please run:" > echo "----------------------------------------------------------------" > echo > -echo "./configure CFLAGS='-g -O0' $args" > +echo "./configure CFLAGS='-g -O2' $args" > echo Should we also add -O2 to my_CFLAGS in configure.ac, or leave that to the user? >
On Fri, May 11, 2018 at 9:00 AM, Verma, Vishal L <vishal.l.verma@intel.com> wrote: > On Thu, 2018-05-10 at 16:47 -0700, Dave Jiang wrote: >> Compiler spits out warning with -D_FORTIFY_SOURCE=2 and -O0. Moving to >> -O2 >> to remove warnings. >> >> Signed-off-by: Dave Jiang <dave.jiang@intel.com> >> --- >> README.md | 2 +- >> autogen.sh | 2 +- >> 2 files changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/README.md b/README.md >> index 899dcbb8..e0bc5b7b 100644 >> --- a/README.md >> +++ b/README.md >> @@ -6,7 +6,7 @@ sub-system in the Linux kernel >> Build >> ===== >> `./autogen.sh` >> -`./configure CFLAGS='-g -O0' --prefix=/usr --sysconfdir=/etc -- >> libdir=/usr/lib64` >> +`./configure CFLAGS='-g -O2' --prefix=/usr --sysconfdir=/etc -- >> libdir=/usr/lib64` >> `make` >> `make check` >> `sudo make install` >> diff --git a/autogen.sh b/autogen.sh >> index a23cf53c..2a52688b 100755 >> --- a/autogen.sh >> +++ b/autogen.sh >> @@ -24,5 +24,5 @@ echo "------------------------------------------------- >> ---------------" >> echo "Initialized build system. For a common configuration please run:" >> echo "----------------------------------------------------------------" >> echo >> -echo "./configure CFLAGS='-g -O0' $args" >> +echo "./configure CFLAGS='-g -O2' $args" >> echo > > Should we also add -O2 to my_CFLAGS in configure.ac, or leave that to the > user? Hmm, does it get in the way of the distro specified CFLAGS?
On Fri, 2018-05-11 at 09:03 -0700, Dan Williams wrote: > On Fri, May 11, 2018 at 9:00 AM, Verma, Vishal L > <vishal.l.verma@intel.com> wrote: > > On Thu, 2018-05-10 at 16:47 -0700, Dave Jiang wrote: > > > Compiler spits out warning with -D_FORTIFY_SOURCE=2 and -O0. Moving > > > to > > > -O2 > > > to remove warnings. > > > > > > Signed-off-by: Dave Jiang <dave.jiang@intel.com> > > > --- > > > README.md | 2 +- > > > autogen.sh | 2 +- > > > 2 files changed, 2 insertions(+), 2 deletions(-) > > > > > > diff --git a/README.md b/README.md > > > index 899dcbb8..e0bc5b7b 100644 > > > --- a/README.md > > > +++ b/README.md > > > @@ -6,7 +6,7 @@ sub-system in the Linux kernel > > > Build > > > ===== > > > `./autogen.sh` > > > -`./configure CFLAGS='-g -O0' --prefix=/usr --sysconfdir=/etc -- > > > libdir=/usr/lib64` > > > +`./configure CFLAGS='-g -O2' --prefix=/usr --sysconfdir=/etc -- > > > libdir=/usr/lib64` > > > `make` > > > `make check` > > > `sudo make install` > > > diff --git a/autogen.sh b/autogen.sh > > > index a23cf53c..2a52688b 100755 > > > --- a/autogen.sh > > > +++ b/autogen.sh > > > @@ -24,5 +24,5 @@ echo "--------------------------------------------- > > > ---- > > > ---------------" > > > echo "Initialized build system. For a common configuration please > > > run:" > > > echo "------------------------------------------------------------ > > > ----" > > > echo > > > -echo "./configure CFLAGS='-g -O0' $args" > > > +echo "./configure CFLAGS='-g -O2' $args" > > > echo > > > > Should we also add -O2 to my_CFLAGS in configure.ac, or leave that to > > the > > user? > > Hmm, does it get in the way of the distro specified CFLAGS? rpmbuild CFLAGS seem to add to the ones specified here. Not sure what would happen if both -O1 and -O2 were present for example..
On Fri, 2018-05-11 at 16:15 +0000, Verma, Vishal L wrote: > On Fri, 2018-05-11 at 09:03 -0700, Dan Williams wrote: > > On Fri, May 11, 2018 at 9:00 AM, Verma, Vishal L > > <vishal.l.verma@intel.com> wrote: > > > On Thu, 2018-05-10 at 16:47 -0700, Dave Jiang wrote: > > > > Compiler spits out warning with -D_FORTIFY_SOURCE=2 and -O0. Moving > > > > to > > > > -O2 > > > > to remove warnings. > > > > > > > > Signed-off-by: Dave Jiang <dave.jiang@intel.com> > > > > --- > > > > README.md | 2 +- > > > > autogen.sh | 2 +- > > > > 2 files changed, 2 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/README.md b/README.md > > > > index 899dcbb8..e0bc5b7b 100644 > > > > --- a/README.md > > > > +++ b/README.md > > > > @@ -6,7 +6,7 @@ sub-system in the Linux kernel > > > > Build > > > > ===== > > > > `./autogen.sh` > > > > -`./configure CFLAGS='-g -O0' --prefix=/usr --sysconfdir=/etc -- > > > > libdir=/usr/lib64` > > > > +`./configure CFLAGS='-g -O2' --prefix=/usr --sysconfdir=/etc -- > > > > libdir=/usr/lib64` > > > > `make` > > > > `make check` > > > > `sudo make install` > > > > diff --git a/autogen.sh b/autogen.sh > > > > index a23cf53c..2a52688b 100755 > > > > --- a/autogen.sh > > > > +++ b/autogen.sh > > > > @@ -24,5 +24,5 @@ echo "------------------------------------------- > > > > -- > > > > ---- > > > > ---------------" > > > > echo "Initialized build system. For a common configuration please > > > > run:" > > > > echo "------------------------------------------------------------ > > > > ----" > > > > echo > > > > -echo "./configure CFLAGS='-g -O0' $args" > > > > +echo "./configure CFLAGS='-g -O2' $args" > > > > echo > > > > > > Should we also add -O2 to my_CFLAGS in configure.ac, or leave that to > > > the > > > user? > > > > Hmm, does it get in the way of the distro specified CFLAGS? > > rpmbuild CFLAGS seem to add to the ones specified here. Not sure what > would > happen if both -O1 and -O2 were present for example.. From the gcc manual, If you use multiple -O options, with or without level numbers, the last such option is the one that is effective. So the distro CFLAGS should append to/override anything we specify in my_CFLAGS. > _______________________________________________ > Linux-nvdimm mailing list > Linux-nvdimm@lists.01.org > https://lists.01.org/mailman/listinfo/linux-nvdimm
On Fri, May 11, 2018 at 9:22 AM, Verma, Vishal L <vishal.l.verma@intel.com> wrote: > On Fri, 2018-05-11 at 16:15 +0000, Verma, Vishal L wrote: >> On Fri, 2018-05-11 at 09:03 -0700, Dan Williams wrote: >> > On Fri, May 11, 2018 at 9:00 AM, Verma, Vishal L >> > <vishal.l.verma@intel.com> wrote: >> > > On Thu, 2018-05-10 at 16:47 -0700, Dave Jiang wrote: >> > > > Compiler spits out warning with -D_FORTIFY_SOURCE=2 and -O0. Moving >> > > > to >> > > > -O2 >> > > > to remove warnings. >> > > > >> > > > Signed-off-by: Dave Jiang <dave.jiang@intel.com> >> > > > --- >> > > > README.md | 2 +- >> > > > autogen.sh | 2 +- >> > > > 2 files changed, 2 insertions(+), 2 deletions(-) >> > > > >> > > > diff --git a/README.md b/README.md >> > > > index 899dcbb8..e0bc5b7b 100644 >> > > > --- a/README.md >> > > > +++ b/README.md >> > > > @@ -6,7 +6,7 @@ sub-system in the Linux kernel >> > > > Build >> > > > ===== >> > > > `./autogen.sh` >> > > > -`./configure CFLAGS='-g -O0' --prefix=/usr --sysconfdir=/etc -- >> > > > libdir=/usr/lib64` >> > > > +`./configure CFLAGS='-g -O2' --prefix=/usr --sysconfdir=/etc -- >> > > > libdir=/usr/lib64` >> > > > `make` >> > > > `make check` >> > > > `sudo make install` >> > > > diff --git a/autogen.sh b/autogen.sh >> > > > index a23cf53c..2a52688b 100755 >> > > > --- a/autogen.sh >> > > > +++ b/autogen.sh >> > > > @@ -24,5 +24,5 @@ echo "------------------------------------------- >> > > > -- >> > > > ---- >> > > > ---------------" >> > > > echo "Initialized build system. For a common configuration please >> > > > run:" >> > > > echo "------------------------------------------------------------ >> > > > ----" >> > > > echo >> > > > -echo "./configure CFLAGS='-g -O0' $args" >> > > > +echo "./configure CFLAGS='-g -O2' $args" >> > > > echo >> > > >> > > Should we also add -O2 to my_CFLAGS in configure.ac, or leave that to >> > > the >> > > user? >> > >> > Hmm, does it get in the way of the distro specified CFLAGS? >> >> rpmbuild CFLAGS seem to add to the ones specified here. Not sure what >> would >> happen if both -O1 and -O2 were present for example.. > > From the gcc manual, > > If you use multiple -O options, with or without level numbers, > the last such option is the one that is effective. > > So the distro CFLAGS should append to/override anything we specify in > my_CFLAGS. > Ok, cool.
diff --git a/README.md b/README.md index 899dcbb8..e0bc5b7b 100644 --- a/README.md +++ b/README.md @@ -6,7 +6,7 @@ sub-system in the Linux kernel Build ===== `./autogen.sh` -`./configure CFLAGS='-g -O0' --prefix=/usr --sysconfdir=/etc --libdir=/usr/lib64` +`./configure CFLAGS='-g -O2' --prefix=/usr --sysconfdir=/etc --libdir=/usr/lib64` `make` `make check` `sudo make install` diff --git a/autogen.sh b/autogen.sh index a23cf53c..2a52688b 100755 --- a/autogen.sh +++ b/autogen.sh @@ -24,5 +24,5 @@ echo "----------------------------------------------------------------" echo "Initialized build system. For a common configuration please run:" echo "----------------------------------------------------------------" echo -echo "./configure CFLAGS='-g -O0' $args" +echo "./configure CFLAGS='-g -O2' $args" echo
Compiler spits out warning with -D_FORTIFY_SOURCE=2 and -O0. Moving to -O2 to remove warnings. Signed-off-by: Dave Jiang <dave.jiang@intel.com> --- README.md | 2 +- autogen.sh | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)