[Buildroot] [PATCH 1/2] Avoid misleading error output caused by missing shell quotes

[Buildroot] [PATCH 1/2] Avoid misleading error output caused by missing shell quotes

[Jens Stimpfle]

Signed-off-by: Jens Stimpfle <debian@jstimpfle.de>
---

Notes:
    When g++ is not installed, a misleading error message turns up because
    of a bad combination of an unquoted shell variable and control flow.
    
    > ~/buildroot$ make
    >
    > You may have to install 'g++' on your build machine
    > /home/testuser/buildroot/support/dependencies/dependencies.sh: 136: [: -lt: unexpected operator
    
    This is a nonintrusive workaround.

 support/dependencies/dependencies.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
index a9c5b31..4b8991d 100755
--- a/support/dependencies/dependencies.sh
+++ b/support/dependencies/dependencies.sh
@@ -118,7 +118,6 @@ CXXCOMPILER=$(which $HOSTCXX_NOCCACHE 2> /dev/null)
 if [ -z "$CXXCOMPILER" ] ; then
 	CXXCOMPILER=$(which c++ 2> /dev/null)
 fi
-
 if [ -z "$CXXCOMPILER" ] ; then
 	echo
 	echo "You may have to install 'g++' on your build machine"
@@ -130,7 +129,8 @@ if [ ! -z "$CXXCOMPILER" ] ; then
 		echo
 		echo "You may have to install 'g++' on your build machine"
 	fi
-
+fi
+if [ ! -z "$CXXCOMPILER_VERSION" ] ; then
 	CXXCOMPILER_MAJOR=$(echo $CXXCOMPILER_VERSION | sed -e "s/\..*//g")
 	CXXCOMPILER_MINOR=$(echo $CXXCOMPILER_VERSION | sed -e "s/^$CXXCOMPILER_MAJOR\.//g" -e "s/\..*//g")
 	if [ $CXXCOMPILER_MAJOR -lt 3 -o $CXXCOMPILER_MAJOR -eq 2 -a $CXXCOMPILER_MINOR -lt 95 ] ; then
-- 
2.1.1

[Buildroot] [PATCH 2/2] Unclutter standard error output while feature testing for 32 bit gcc

[Jens Stimpfle]

Signed-off-by: Jens Stimpfle <debian@jstimpfle.de>
---

Notes:
    The screen is cluttered when we build for 32bit target and 32bit gcc
    missing.
    
    > ~/buildroot$ make
    >
    > You may have to install 'g++' on your build machine
    > /home/testuser/buildroot/support/dependencies/dependencies.sh: 136: [: -lt: unexpected operator
    > /usr/bin/ld: cannot find crt1.o: No such file or directory
    > /usr/bin/ld: cannot find crti.o: No such file or directory
    > /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc.a when searching for -lgcc
    > /usr/bin/ld: cannot find -lgcc
    > /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc_s.so when searching for -lgcc_s
    > /usr/bin/ld: cannot find -lgcc_s
    > /usr/bin/ld: cannot find -lc
    > /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc.a when searching for -lgcc
    > /usr/bin/ld: cannot find -lgcc
    > /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc_s.so when searching for -lgcc_s
    > /usr/bin/ld: cannot find -lgcc_s
    > /usr/bin/ld: cannot find crtn.o: No such file or directory
    > collect2: error: ld returned 1 exit status
    >
    > Your Buildroot configuration needs a compiler capable of building 32 bits binaries.
    [...]
    
    The final note is enough, and adding 2>/dev/null to the gcc test invocation is
    also more consistent with the rest of the script. The patch makes the
    /usr/bin/ld: and collect2: lines go away.

 support/dependencies/dependencies.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
index 4b8991d..dcf37f0 100755
--- a/support/dependencies/dependencies.sh
+++ b/support/dependencies/dependencies.sh
@@ -222,7 +222,7 @@ if grep -q ^BR2_HOSTARCH_NEEDS_IA32_LIBS=y $BR2_CONFIG ; then
 fi
 
 if grep -q ^BR2_HOSTARCH_NEEDS_IA32_COMPILER=y $BR2_CONFIG ; then
-	if ! echo "int main(void) {}" | gcc -m32 -x c - -o /dev/null ; then
+	if ! echo "int main(void) {}" | gcc -m32 -x c - -o /dev/null 2>/dev/null; then
 		echo
 		echo "Your Buildroot configuration needs a compiler capable of building 32 bits binaries."
 		echo "If you're running a Debian/Ubuntu distribution, install the gcc-multilib package."
-- 
2.1.1

[Buildroot] [PATCH 1/2] Avoid misleading error output caused by missing shell quotes

[Yann E. MORIN]

Jens, All,

On 2014-11-12 13:31 +0000, Jens Stimpfle spake thusly:
> Signed-off-by: Jens Stimpfle <debian@jstimpfle.de>
> ---
> 
> Notes:
>     When g++ is not installed, a misleading error message turns up because
>     of a bad combination of an unquoted shell variable and control flow.
>     
>     > ~/buildroot$ make
>     >
>     > You may have to install 'g++' on your build machine
>     > /home/testuser/buildroot/support/dependencies/dependencies.sh: 136: [: -lt: unexpected operator

This should have been part of the commit log, above your Signed-off-by
line.

Whatever is after the --- line is ignored by git when a patch is
applied, but the information you provide is interesting and we want to
keep it in the logs.

What about changing your commit log to:

    support: avoid spurious error output when checking dependencies

    When g++ is not installed, a misleading error message turns up because
    of a bad combination of an unquoted shell variable and control flow.

        $ ~/buildroot$ make
        You may have to install 'g++' on your build machine
        /home/testuser/buildroot/support/dependencies/dependencies.sh: 136: [: -lt: unexpected operator

    Signed-off-by: You

Otherwise, the change looks sane, but see below...

>     This is a nonintrusive workaround.
> 
>  support/dependencies/dependencies.sh | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
> index a9c5b31..4b8991d 100755
> --- a/support/dependencies/dependencies.sh
> +++ b/support/dependencies/dependencies.sh
> @@ -118,7 +118,6 @@ CXXCOMPILER=$(which $HOSTCXX_NOCCACHE 2> /dev/null)
>  if [ -z "$CXXCOMPILER" ] ; then
>  	CXXCOMPILER=$(which c++ 2> /dev/null)
>  fi
> -

Spurious empty line removal. Please keep it.

>  if [ -z "$CXXCOMPILER" ] ; then
>  	echo
>  	echo "You may have to install 'g++' on your build machine"
> @@ -130,7 +129,8 @@ if [ ! -z "$CXXCOMPILER" ] ; then
>  		echo
>  		echo "You may have to install 'g++' on your build machine"
>  	fi
> -
> +fi
> +if [ ! -z "$CXXCOMPILER_VERSION" ] ; then

I'd like it if there was an empty line after the 'fi' and before the
'if'.

Also, we prefer positive logic:

    if [ -n "$CXXCOMPILER_VERSION" ] ; then

Regards,
Yann E. MORIN.

>  	CXXCOMPILER_MAJOR=$(echo $CXXCOMPILER_VERSION | sed -e "s/\..*//g")
>  	CXXCOMPILER_MINOR=$(echo $CXXCOMPILER_VERSION | sed -e "s/^$CXXCOMPILER_MAJOR\.//g" -e "s/\..*//g")
>  	if [ $CXXCOMPILER_MAJOR -lt 3 -o $CXXCOMPILER_MAJOR -eq 2 -a $CXXCOMPILER_MINOR -lt 95 ] ; then
> -- 
> 2.1.1
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'

[Buildroot] [PATCH 2/2] Unclutter standard error output while feature testing for 32 bit gcc

[Yann E. MORIN]

Jens, All,

On 2014-11-12 13:31 +0000, Jens Stimpfle spake thusly:
> Signed-off-by: Jens Stimpfle <debian@jstimpfle.de>
> ---
> 
> Notes:
>     The screen is cluttered when we build for 32bit target and 32bit gcc
>     missing.
>     
>     > ~/buildroot$ make
>     >
>     > You may have to install 'g++' on your build machine
>     > /home/testuser/buildroot/support/dependencies/dependencies.sh: 136: [: -lt: unexpected operator
>     > /usr/bin/ld: cannot find crt1.o: No such file or directory
>     > /usr/bin/ld: cannot find crti.o: No such file or directory
>     > /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc.a when searching for -lgcc
>     > /usr/bin/ld: cannot find -lgcc
>     > /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc_s.so when searching for -lgcc_s
>     > /usr/bin/ld: cannot find -lgcc_s
>     > /usr/bin/ld: cannot find -lc
>     > /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc.a when searching for -lgcc
>     > /usr/bin/ld: cannot find -lgcc
>     > /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc_s.so when searching for -lgcc_s
>     > /usr/bin/ld: cannot find -lgcc_s
>     > /usr/bin/ld: cannot find crtn.o: No such file or directory
>     > collect2: error: ld returned 1 exit status
>     >
>     > Your Buildroot configuration needs a compiler capable of building 32 bits binaries.
>     [...]
>     
>     The final note is enough, and adding 2>/dev/null to the gcc test invocation is
>     also more consistent with the rest of the script. The patch makes the
>     /usr/bin/ld: and collect2: lines go away.

Ditto, keep those explanations in the commit log.

Otherwise, looks good.

We're in feature-freeze for the upcoming release at the end of the
month, but I think thos changes could go in. Will you resubmit those
patches soon, so they can get applied before the release?

Regards,
Yann E. MORIN.

>  support/dependencies/dependencies.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/support/dependencies/dependencies.sh b/support/dependencies/dependencies.sh
> index 4b8991d..dcf37f0 100755
> --- a/support/dependencies/dependencies.sh
> +++ b/support/dependencies/dependencies.sh
> @@ -222,7 +222,7 @@ if grep -q ^BR2_HOSTARCH_NEEDS_IA32_LIBS=y $BR2_CONFIG ; then
>  fi
>  
>  if grep -q ^BR2_HOSTARCH_NEEDS_IA32_COMPILER=y $BR2_CONFIG ; then
> -	if ! echo "int main(void) {}" | gcc -m32 -x c - -o /dev/null ; then
> +	if ! echo "int main(void) {}" | gcc -m32 -x c - -o /dev/null 2>/dev/null; then
>  		echo
>  		echo "Your Buildroot configuration needs a compiler capable of building 32 bits binaries."
>  		echo "If you're running a Debian/Ubuntu distribution, install the gcc-multilib package."
> -- 
> 2.1.1
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'

[Buildroot] [PATCH 1/2] Avoid misleading error output caused by missing shell quotes

[Thomas Petazzoni]

Dear Jens Stimpfle,

On Wed, 12 Nov 2014 13:31:44 +0000, Jens Stimpfle wrote:
> Signed-off-by: Jens Stimpfle <debian@jstimpfle.de>

Thanks, both patches applied, with several fixes to the commit log and
code, as suggested by Yann E. Morin. See:

http://git.buildroot.net/buildroot/commit/?id=d1607dc7dfc2c5397ff6b67ebd18d25c6184f650
http://git.buildroot.net/buildroot/commit/?id=94c6417e703d7cd923d50e4974ad555a377ffa02

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com