stb_image_resize2: implicit declaration of function 'vld1q_f16' is invalid in C99 [-Werror,-Wimplicit-function-declaration]

[Martinfx]

Describe the bug Hi, I am maintainer on FreeBSD and you have some problem on arm7 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279369

In file included from /wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/rtextures.c:216:
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2422:22: error: implicit declaration of function 'vld1q_f16' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    float16x8_t in = vld1q_f16(input);
                     ^
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2422:17: error: initializing 'float16x8_t' (vector of 8 'float16_t' values) with an expression of incompatible type 'int'
    float16x8_t in = vld1q_f16(input);
                ^    ~~~~~~~~~~~~~~~~
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2423:27: error: implicit declaration of function 'vcvt_f32_f16' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    vst1q_f32(output + 0, vcvt_f32_f16(vget_low_f16(in)));
                          ^
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2423:5: error: initializing 'float32x4_t' (vector of 4 'float32_t' values) with an expression of incompatible type 'int'
    vst1q_f32(output + 0, vcvt_f32_f16(vget_low_f16(in)));
    ^                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7/usr/lib/clang/14.0.5/include/arm_neon.h:26839:15: note: expanded from macro 'vst1q_f32'
  float32x4_t __s1 = __p1; \
              ^      ~~~~
In file included from /wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/rtextures.c:216:
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2424:27: error: implicit declaration of function 'vcvt_f32_f16' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    vst1q_f32(output + 4, vcvt_f32_f16(vget_high_f16(in)));
                          ^
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2424:5: error: initializing 'float32x4_t' (vector of 4 'float32_t' values) with an expression of incompatible type 'int'
    vst1q_f32(output + 4, vcvt_f32_f16(vget_high_f16(in)));
    ^                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/clang/14.0.5/include/arm_neon.h:26839:15: note: expanded from macro 'vst1q_f32'
  float32x4_t __s1 = __p1; \
              ^      ~~~~
In file included from /wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/rtextures.c:216:
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2429:24: error: implicit declaration of function 'vcvt_f16_f32' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    float16x4_t out0 = vcvt_f16_f32(vld1q_f32(input + 0));
                       ^
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2429:17: error: initializing 'float16x4_t' (vector of 4 'float16_t' values) with an expression of incompatible type 'int'
    float16x4_t out0 = vcvt_f16_f32(vld1q_f32(input + 0));
                ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2430:17: error: initializing 'float16x4_t' (vector of 4 'float16_t' values) with an expression of incompatible type 'int'
    float16x4_t out1 = vcvt_f16_f32(vld1q_f32(input + 4));
                ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2431:5: error: implicit declaration of function 'vst1q_f16' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    vst1q_f16(output, vcombine_f16(out0, out1));
    ^
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2436:27: error: implicit declaration of function 'vcvt_f32_f16' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    return vgetq_lane_f32(vcvt_f32_f16(vdup_n_f16(h)), 0);
                          ^
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2436:12: error: initializing 'float32x4_t' (vector of 4 'float32_t' values) with an expression of incompatible type 'int'
    return vgetq_lane_f32(vcvt_f32_f16(vdup_n_f16(h)), 0);
           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/clang/14.0.5/include/arm_neon.h:7788:15: note: expanded from macro 'vgetq_lane_f32'
  float32x4_t __s0 = __p0; \
              ^      ~~~~
In file included from /wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/rtextures.c:216:
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2441:26: error: implicit declaration of function 'vcvt_f16_f32' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    return vget_lane_f16(vcvt_f16_f32(vdupq_n_f32(f)), 0);
                         ^
/wrkdirs/usr/ports/devel/raylib/work/raylib-5.0/src/external/stb_image_resize2.h:2441:12: error: initializing 'float16x4_t' (vector of 4 'float16_t' values) with an expression of incompatible type 'int'
    return vget_lane_f16(vcvt_f16_f32(vdupq_n_f32(f)), 0);
           ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/lib/clang/14.0.5/include/arm_neon.h:67449:15: note: expanded from macro 'vget_lane_f16'
  float16x4_t __s0_851 = __p0_851; \
              ^          ~~~~~~~~

[jeffrbig2]

ARM 7 works fine for me - we don't use hardware half float on ARM unless you manually define STBIR_FP16C - maybe they did that by accident?

[Martinfx]

Jail has problem with arm7 code this from log from jail https://pkg-status.freebsd.org/ampere1/data/132releng-armv7-quarterly/5038d10feb88/logs/raylib-5.0.log

[nothings]

I'll give an actual answer in the next reply, but the immediate answer is: raylib ships with its own embedded copy of stb_image_resize2.h. Configuration (such as whether "STBIR_FP16C" is being defined) is done by raylib, and so initial bug reports should almost certainly go to raylib, not to us.

Edit: I see you had tried to report it to them and they were unhelpful. Sorry about that.

[nothings]

Now, to give an actual answer...

What is "jail" and what does it have to do with this compilation error? (If it doesn't matter for this compilation error, then don't explain it, we don't need to know.) What version of stb_image_resize2.h is being compiled? Did this work previously, and if so, what changed from when it worked before?

We're not raylib developers and we're not FreeBSD developers. We're stb library developers. You have to provide us with information that relates to how the library is being compiled if you want us to help.

[jeffrbig2]

I got a older GCC build going and repro-ed the issue. Will be fixed shortly.