[ptxdist] [PATCH v2] libpng: version bump 1.6.37 -> 1.6.38

[Bastian Krause <bst@pengutronix.de>]

Effectively reverts parts of
249544ffd ("libpng: version bump 1.6.29 -> 1.6.34").

"--enable-arm-neon=check" leads to problems on ARM64, such as:

  arm/arm_init.c:39:6: error: #error "PNG_ARM_NEON_CHECK_SUPPORTED must not be defined on this platform"

The check mechanism is not recommended anyway [1]:

  WARNING: it is strongly recommended that you do not build libpng with
  run-time checks for CPU features if at all possible.  In the case of the ARM
  NEON instructions there is no processor-specific way of detecting the
  presence of the required support, therefore run-time detection is extremely
  OS specific.

So stick to yes/no for the ARM NEON option by switching to the ptx/yesno
macro.

[1] https://sourceforge.net/p/libpng/code/ci/v1.6.38/tree/arm/arm_init.c#l21

Signed-off-by: Bastian Krause <bst@pengutronix.de>
---
Changes since (implicit) v1:
- adjust --enable-arm-neon option
---
 rules/libpng.make | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/rules/libpng.make b/rules/libpng.make
index 0a1fbdee9..aff687df6 100644
--- a/rules/libpng.make
+++ b/rules/libpng.make
@@ -16,8 +16,8 @@ PACKAGES-$(PTXCONF_LIBPNG) += libpng
 #
 # Paths and names
 #
-LIBPNG_VERSION	:= 1.6.37
-LIBPNG_MD5	:= 015e8e15db1eecde5f2eb9eb5b6e59e9
+LIBPNG_VERSION	:= 1.6.38
+LIBPNG_MD5	:= 122e6b7837811698563083b352bc8ca2
 LIBPNG		:= libpng-$(LIBPNG_VERSION)
 LIBPNG_SUFFIX	:= tar.xz
 LIBPNG_URL	:= $(call ptx/mirror, SF, libpng/$(LIBPNG).$(LIBPNG_SUFFIX))
@@ -37,7 +37,7 @@ LIBPNG_CONF_OPT := \
 	--enable-unversioned-links \
 	--enable-unversioned-libpng-pc \
 	--enable-unversioned-libpng-config \
-	--enable-arm-neon=$(call ptx/ifdef, PTXCONF_ARCH_ARM_NEON, check, no) \
+	--enable-arm-neon=$(call ptx/yesno, PTXCONF_ARCH_ARM_NEON) \
 	--disable-mips-msa \
 	--$(call ptx/endis, PTXCONF_ARCH_X86)-intel-sse \
 	--disable-powerpc-vsx \
-- 
2.30.2