GCC Cross Compiler Fails to Recognize Parameters \ VOGONS

GCC Cross Compiler Fails to Recognize Parameters

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First post, by nahum

Posted on 2024-02-28, 01:57

nahum Offline

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Joined: 2017-01-09, 07:24

RE: ffmpeg-4.4
DJGPP CROSS COMPILER, GCC v12.2.0
Host: Macbook Pro, macOS Monterey
link
link

"DJGPP Cross Compiler 12.2.0 Fails to Recognize Parameters in FFmpeg Source Code"
Hi,
I am using the referenced DJGPP cross compiler 12.2.0, to build the FFmpeg source code, and it's failing to recognize certain parameters and the script I used to build FFmpeg SRC follows:

1#!/usr/bin/env bash
2
3# Path to DJGPP cross compiler
4export DJGPP_PREFIX="/Users/owner/djcc"
5# export DJGPP_PREFIX=${DJGPP_PREFIX-/Users/owner/djcc}
6export DJGPP_PREFIX2=${DJGPP_PREFIX2-/Users/owner/ffcc}
7# export 
8DJGPP_PREFIX3=${DJGPP_PREFIX3-/Users/owner/Documents/DOSBox/NET/watt}
9# system path
10export PATH="$DJGPP_PREFIX/bin:$PATH"
11
12# Your cross compilation target
13TARGET_ARCH="$DJGPP_PREFIX/bin/i586-pc-msdosdjgpp"
14# set C_INCLUDE_PATH environment variable
15export C_INCLUDE_PATH="#DJGPP_PREFIX/i586-pc-msdosdjgpp/sys-include"
16
17# Download FFmpeg source code
18FFMPEG_VERSION="4.4"
19FFMPEG_ARCHIVE="https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.gz"
20FFMPEG_SOURCE_DIR="ffmpeg-${FFMPEG_VERSION}"
21
22# Download FFmpeg source
23echo "Downloading FFmpeg source..."
24wget -c "$FFMPEG_ARCHIVE" || exit 1
25tar -xf "ffmpeg-${FFMPEG_VERSION}.tar.gz" || exit 1
26cd "$FFMPEG_SOURCE_DIR" || exit 1
27
28# clean debri
29gmake clean
30
31# Redirect both stdout and stderr to separate .err files
32exec > >(tee -ia gcca.txt) 2> >(tee -ia gcc_err.err >&2)
33
34# Configure FFmpeg for cross-compilation
35echo "Configuring FFmpeg for cross-compilation..."
36./configure --enable-cross-compile \
37           --prefix="$DJGPP_PREFIX2" \
38           --target-os=ms-dos \
39           --arch=i486 \
40           --cross-prefix="$TARGET_ARCH-" \
41           --extra-cflags="-I$DJGPP_PREFIX/i586-pc-msdosdjgpp/sys-include -I$DJGPP_PREFIX/include -I$DJGPP_PREFIX3/inc2 -I$DJGPP_PREFIX3/inc3" \
42           --extra-ldflags="-L$DJGPP_PREFIX/i586-pc-msdosdjgpp/lib -L$DJGPP_PREFIX/lib -L$DJGPP_PREFIX3/lib2 -L$DJGPP_PREFIX3/lib3" \
43           --enable-debug \
44           --disable-shared \
45           --enable-static \
46           --disable-doc \
47           --disable-programs \
48           || exit 1
49
50# Compile a hello world program for testing
51echo "Compiling hello world program for testing..."
52cat > helloai.c <<EOF
53#include <stdio.h>
54
55int main() {
56    printf("Hello, world!\\n");
57    return 0;
58}
59EOF
60

…Show last 9 lines

61"$TARGET_ARCH-gcc" helloai.c -o helloai || exit 1
62
63# Compile FFmpeg
64echo "Compiling FFmpeg..."
65gmake CC="$DJGPP_PREFIX/bin/i586-pc-msdosdjgpp-gcc" || exit 1 
66# gmake install || exit 1
67
68echo "Compilation complete."

The following 36 issues surfaced compiling FFmpeg DJGPP 'make' cross compile, stating, "error: declaration for parameter 'XX_XXXX_XX_XXXX' but no such parameter:".

1) 'ff_log_net_error' […]
Show full quote

1) 'ff_log_net_error'

2) 'ff_socket'

3) 'ff_http_match_no_proxy'

4) 'ff_listen_connect'

5) 'ff_accept'

6) 'ff_listen'

7) 'ff_listen_bind'

😎 'ff_is_multicast_address'

9) 'ff_gai_strerror'

10)'ff_getnameinfo'

11) 'ff_freeaddrinfo'

12) 'ff_getaddrinfo'

13) 'sockaddr_union'

14) 'ff_network_sleep_interruptible'

15) 'ff_network_wait_fd_timeout'

16) 'ff_network_wait_fd'

17) 'ff_tls_deinit'

18) 'ff_tls_init'

19) 'ff_network_close'

20) 'ff_network_init'

21) 'ff_socket_nonblock'

22) 'ff_connect_parallel'

23) 'ff_log_net_error'

24) 'ff_socket'

25) 'ff_http_match_no_proxy'

26) 'ff_listen_connect'

27) 'ff_accept'

28) 'ff_listen'

29)'ff_listen_bind'

30) 'ff_is_multicast_address'

31) 'ff_gai_strerror'

32) 'ff_getnameinfo'

33) 'ff_freeaddrinfo'

34) 'ff_getaddrinfo'

35) 'sockaddr_union'

36) 'ff_network_sleep_interruptible'

The 'no such parameter', observed in 'libavformat/network.h', has now shown up in
'/libavformat/avio.c':

libavformat/avio.c:57:23: error: declaration for parameter 'options' but no such parameter

libavformat/avio.c:64:15: error: declaration for parameter 'ffurl_context_class' but no such parameter

1// libavformat/avio.c
2#include "libavutil/avstring.h"
3#include "libavutil/dict.h"
4#include "libavutil/opt.h"
5#include "libavutil/time.h"
6#include "libavutil/avassert.h"
7#include "os_support.h"
8#include "avformat.h"
9#include "internal.h"
10#if CONFIG_NETWORK
11#include "network.h"
12#endif
13#include "url.h"
14
15/** @name Logging context. */
16/*@{*/
17static const char *urlcontext_to_name(void *ptr)
18{
19    URLContext *h = (URLContext *)ptr;
20    if (h->prot)
21        return h->prot->name;
22    else
23        return "NULL";
24}
25
26static void *urlcontext_child_next(void *obj, void *prev)
27{
28    URLContext *h = obj;
29    if (!prev && h->priv_data && h->prot->priv_data_class)
30        return h->priv_data;
31    return NULL;
32}
33
34#define OFFSET(x) offsetof(URLContext,x)
35#define E AV_OPT_FLAG_ENCODING_PARAM
36#define D AV_OPT_FLAG_DECODING_PARAM
37static const AVOption options[] = { // L57:23
38    {"protocol_whitelist", "List of protocols that are allowed to be used", OFFSET(protocol_whitelist), AV_OPT_TYPE_STRING, { .str = NULL },  0, 0, D },
39    {"protocol_blacklist", "List of protocols that are not allowed to be used", OFFSET(protocol_blacklist), AV_OPT_TYPE_STRING, { .str = NULL },  0, 0, D },
40    {"rw_timeout", "Timeout for IO operations (in microseconds)", offsetof(URLContext, rw_timeout), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_DECODING_PARAM },
41    { NULL }
42};
43
44const AVClass ffurl_context_class = { // L64:15
45    .class_name       = "URLContext",
46    .item_name        = urlcontext_to_name,
47    .option           = options,
48    .version          = LIBAVUTIL_VERSION_INT,
49    .child_next       = urlcontext_child_next,
50#if FF_API_CHILD_CLASS_NEXT
51    .child_class_next = ff_urlcontext_child_class_next,
52#endif
53    .child_class_iterate = ff_urlcontext_child_class_iterate,
54};
55/*@}*/

This same source code compiled on mac's clang compiler, however, GCC cross compiler is a different story. Therefore, please explain the root cause inhibiting make build of FFmpeg, thanks!

Reply 1 of 6, by Stretch

Posted on 2024-02-28, 12:43

Stretch Offline

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Posts: 551
Joined: 2013-11-16, 00:57

In line 15 of your script, change the # to a $

Win 11 - Intel i7-1360p - 32 GB - Intel Iris Xe - Cubilux 7.1 USB

Reply 2 of 6, by elszgensa

Posted on 2024-02-28, 14:16

elszgensa Offline

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Posts: 528
Joined: 2023-01-08, 15:35

no idea why you deem it necessary to work with three prefixes, yet not pass even a single one of those as sysroot... fwiw this:

1#!/bin/bash
2
3set -e
4
5export DJGPP_PREFIX="${HOME}/x-tools/i586-pc-msdosdjgpp"
6TARGET_ARCH="${DJGPP_PREFIX}/bin/i586-pc-msdosdjgpp"
7export PATH="${DJGPP_PREFIX}/bin:$PATH"
8
9FFMPEG_VERSION="4.4"
10FFMPEG_ARCHIVE="https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.gz"
11FFMPEG_SOURCE_DIR="ffmpeg-${FFMPEG_VERSION}"
12
13wget -c "$FFMPEG_ARCHIVE"
14rm -rf "$FFMPEG_SOURCE_DIR"
15tar -xf "ffmpeg-${FFMPEG_VERSION}.tar.gz"
16cd "$FFMPEG_SOURCE_DIR"
17
18./configure \
19    --enable-cross-compile \
20    --cross-prefix="${TARGET_ARCH}-" \
21    --sysroot="${DJGPP_PREFIX}" \
22    --arch=i486 \
23    --target-os=ms-dos \
24    --extra-cflags="-w" \
25    --disable-doc \
26
27make V=1 -j$(nproc)

...works for me.

To work around djgpp's float limits not being defined as constants (which is not to spec) I did something hacky to its headers:

jank

1--- a/i586-pc-msdosdjgpp/sys-include/float.h	2015-05-02 06:31:45.000000000 +0200
2+++ b/i586-pc-msdosdjgpp/sys-include/float.h	2024-02-28 14:39:25.578626816 +0100
3@@ -15,10 +15,10 @@
4 #define FLT_DIG		6
5 #define FLT_EPSILON	__dj_float_epsilon
6 #define FLT_MANT_DIG	24
7-#define FLT_MAX		__dj_float_max
8+#define FLT_MAX		666
9 #define FLT_MAX_10_EXP	38
10 #define FLT_MAX_EXP	128
11-#define FLT_MIN		__dj_float_min
12+#define FLT_MIN		(-666)
13 #define FLT_MIN_10_EXP	(-37)
14 #define FLT_MIN_EXP	(-125)
15 #define FLT_RADIX	2
16@@ -31,10 +31,10 @@
17 #define DBL_DIG		15
18 #define DBL_EPSILON	__dj_double_epsilon
19 #define DBL_MANT_DIG	53
20-#define DBL_MAX		__dj_double_max
21+#define DBL_MAX		666
22 #define DBL_MAX_10_EXP	308
23 #define DBL_MAX_EXP	1024
24-#define DBL_MIN		__dj_double_min
25+#define DBL_MIN		(-666)
26 #define DBL_MIN_10_EXP	(-307)
27 #define DBL_MIN_EXP	(-1021)
28

...which is not a proper solution but will at least get things moving.

Reply 3 of 6, by nahum

Posted on 2024-03-01, 01:04

nahum Offline

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Posts: 18
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elszgensa wrote on 2024-02-28, 14:16:

To work around djgpp's float limits not being defined as constants (which is not to spec) I did something hacky to its headers:

jank

1--- a/i586-pc-msdosdjgpp/sys-include/float.h	2015-05-02 06:31:45.000000000 +0200
2+++ b/i586-pc-msdosdjgpp/sys-include/float.h	2024-02-28 14:39:25.578626816 +0100
3@@ -15,10 +15,10 @@
4 #define FLT_DIG		6
5 #define FLT_EPSILON	__dj_float_epsilon
6 #define FLT_MANT_DIG	24
7-#define FLT_MAX		__dj_float_max
8+#define FLT_MAX		666
9 #define FLT_MAX_10_EXP	38
10 #define FLT_MAX_EXP	128
11-#define FLT_MIN		__dj_float_min
12+#define FLT_MIN		(-666)
13 #define FLT_MIN_10_EXP	(-37)
14 #define FLT_MIN_EXP	(-125)
15 #define FLT_RADIX	2
16@@ -31,10 +31,10 @@
17 #define DBL_DIG		15
18 #define DBL_EPSILON	__dj_double_epsilon
19 #define DBL_MANT_DIG	53
20-#define DBL_MAX		__dj_double_max
21+#define DBL_MAX		666
22 #define DBL_MAX_10_EXP	308
23 #define DBL_MAX_EXP	1024
24-#define DBL_MIN		__dj_double_min
25+#define DBL_MIN		(-666)
26 #define DBL_MIN_10_EXP	(-307)
27 #define DBL_MIN_EXP	(-1021)
28

...which is not a proper solution but will at least get things moving.

elszgensa,
Using this quick-n-dirty work around did build ffmpeg, ffprobe executables and no sign of ffplay.
ffmpeg help screen did display ok, however, no functionality, only the following issues:

ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers built with gcc 12.2.0 (GCC) configuration: --enable-cross-c […]
Show full quote
ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 12.2.0 (GCC)
configuration: --enable-cross-compile --cross-prefix=/Users/owner/djcc3/bin/i586-pc-msdosdjgpp- --sysroot=/Users/owner/djcc3 --arch=i486 --target-os=ms-dos --extra-cflags=-w --disable-doc
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
[h264 @ 1a84f98] Warning: not compiled with thread support, using thread emulation
[aac @ 1a85bb0] Warning: not compiled with thread support, using thread emulation
Exiting due to signal SIGILL
Invalid Opcode at eip=00e39b0c
eax=00000000 ebx=01abde64 ecx=00000000 edx=00000000 esi=00000000 edi=01abdf9b
ebp=01abde78 esp=01a827c0 program=C:\1RECV\FFMPEG.EXE
cs: sel=00a7 base=00400000 limit=01ceffff
ds: sel=00af base=00400000 limit=01ceffff
es: sel=00af base=00400000 limit=01ceffff
fs: sel=008f base=00004ae0 limit=0000ffff
gs: sel=00bf base=00000000 limit=0010ffff
ss: sel=00af base=00400000 limit=01ceffff
App stack: [01a83210..01a03210] Exceptn stack: [01a0292c..01a009ec]

Call frame traceback EIPs:
0x00e39b0c

Any comments or suggestions interpreting signal SIGILL and its work around, would be appreciated. Thanks in advance!

Reply 4 of 6, by elszgensa

Posted on 2024-03-01, 13:49

elszgensa Offline

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Rank: Oldbie
Posts: 528
Joined: 2023-01-08, 15:35

By "get things moving" I meant solely in the context of getting stuff shoved through the compiler (to see if any other issues crop up at this point), not that the end result would work. You still need to fix that properly.

Maybe try some less complex codecs than h264+aac to start with. In fact, I'd recommend entirely configuring out anything you don't need for basic functionality, features as well as optimizations (e.g. --disable-asm), and build from there.

ffplay requires SDL so you're gonna have to provide that too. There's a readme only for Watcom, but the config scripts also have a few places handling DJGPP already, so I have no idea how much effort that'd be. I haven't tried.

Afraid that's all you're gonna get from me, I don't really have the time to deep dive into this.

Reply 5 of 6, by nahum

Posted on 2024-03-03, 05:56

nahum Offline

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Rank: Newbie
Posts: 18
Joined: 2017-01-09, 07:24

elszgensa wrote on 2024-03-01, 13:49:

ffplay requires SDL so you're gonna have to provide that too.

Hi,
The latest FFmpeg DJGPP GCC v12.2.0 cross compiler build works like a charm w/o any tweaks, so it can only get better!
If ffplay requires SDL, can DJGPP cross compiler handle its build, using the following Hotlinks, etc., Thanks in advance!

link

Reply 6 of 6, by megatron-uk

Posted on 2024-03-03, 07:55

megatron-uk Offline

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Rank: l33t
Posts: 2233
Joined: 2010-09-07, 10:53
Location: UK

Have you actually looked yourself at whether SDL 2 (which ffmpeg requires) supports DOS output targets?

People have been wanting this for years and years:

https://discourse.libsdl.org/t/porting-sdl-to-dos/27361

My collection database and technical wiki:
https://www.target-earth.net

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