[Buildroot] [PATCH 1/1] package/libtasn1: fix build with gcc 4.8

[Yann E. MORIN <yann.morin.1998@free.fr>]

Fabrice, All,

On 2020-04-24 17:04 +0200, Fabrice Fontaine spake thusly:
> Fixes:
>  - http://autobuild.buildroot.org/results/0030c903abf6c964806a97067af94a99867a3896
> 
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> ---
>  ...orpus2array.c-fix-build-with-gcc-4.8.patch | 46 +++++++++++++++++++
>  1 file changed, 46 insertions(+)
>  create mode 100644 package/libtasn1/0002-fuzz-corpus2array.c-fix-build-with-gcc-4.8.patch
> 
> diff --git a/package/libtasn1/0002-fuzz-corpus2array.c-fix-build-with-gcc-4.8.patch b/package/libtasn1/0002-fuzz-corpus2array.c-fix-build-with-gcc-4.8.patch
> new file mode 100644
> index 0000000000..e44dd5c8e4
> --- /dev/null
> +++ b/package/libtasn1/0002-fuzz-corpus2array.c-fix-build-with-gcc-4.8.patch
> @@ -0,0 +1,46 @@
> +From f633abcfb9cff19efca53aa68ddc96217e7487ae Mon Sep 17 00:00:00 2001
> +From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> +Date: Fri, 24 Apr 2020 16:57:35 +0200
> +Subject: [PATCH] fuzz/corpus2array.c: fix build with gcc 4.8
> +
> +Fix the following build failure with gcc 4.8:
> +
> +corpus2array.c:123:4: error: 'for' loop initial declarations are only allowed in C99 mode
> +    for (int i = 8; i < 32 ; i++) {
> +    ^
> +corpus2array.c:123:4: note: use option -std=c99 or -std=gnu99 to compile your code
> +
> +Fixes:
> + - http://autobuild.buildroot.org/results/0030c903abf6c964806a97067af94a99867a3896
> +
> +Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
> +[Upstream status: not sent yet]
> +---
> + fuzz/corpus2array.c | 4 ++--
> + 1 file changed, 2 insertions(+), 2 deletions(-)
> +
> +diff --git a/fuzz/corpus2array.c b/fuzz/corpus2array.c
> +index fc30524..b2d01ee 100644
> +--- a/fuzz/corpus2array.c
> ++++ b/fuzz/corpus2array.c
> +@@ -112,7 +112,7 @@ int main(void)
> + 			printf("  { NULL");
> + 
> + 		if (e.type) {
> +-			int add = 0;
> ++			int i, add = 0;
> + 
> + 			// we leave the lowest 8 bit out
> + 			if ((e.type & 0xFF) == 17) {
> +@@ -120,7 +120,7 @@ int main(void)
> + 				add = 1;
> + 			}
> + 
> +-			for (int i = 8; i < 32 ; i++) {
> ++			for (i = 8; i < 32 ; i++) {

I think a better solution would be to switch to using -std=gnu99 (or
std=c99). For example:

    LIBTASN1_CONF_OPTS = CFLAGS="$(TARGET_CFLAGS) -std=gnu99"

I've doen a quick test-build, and it seems to fit the bill here. Care to
sanity-check this proposal and resend, please?

Regards,
Yann E. MORIN.

> + 				if ((e.type & (1U << i)) && typename[i - 8]) {
> + 					printf(add ? "|%s" : ", %s", typename[i - 8]);
> + 					add = 1;
> +-- 
> +2.25.1
> +
> -- 
> 2.25.1
> 
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