This document lists some software known to build successfully, and any special procedures necessary.

#Software notes


One of the main goals of cproc is to compile the entire oasis linux system (excluding kernel and libc). This is a work in progress, but many packages have patches to fix various ISO C conformance issues, enabling them to be built.

See the oasis #13 for the current status of this effort, and the patch directories in the oasis package tree for any patches used.


On musl systems, you must define long double to match double (as below) to avoid errors in unused static inline functions in musl's math.h. Note: this is a hack and won't be ABI-incompatible with musl; things will break if any functions with long double get called.

-struct type typeldouble = FLTTYPE(TYPELDOUBLE, 16, NULL);  // XXX: not supported by qbe
+struct type typeldouble = FLTTYPE(TYPELDOUBLE, 8, &f64);

Requires several patches available here:

  • Disable long double support in _bfd_doprnt.
  • Implement pex_unix_exec_child with posix_spawn instead of vfork and subtle volatile usage.
  • Provide fallback definitions for _libctf_*_ attribute macros, accidentally omitted when merged into binutils (#25120).
  • Remove usage of __thread, only necessary when linking libctf externally (#25120).

Configure with

./configure --disable-gdb --disable-plugins --disable-readline
#gcc 4.7

Requires a number of patches available here:

Also requires gmp headers modified for C99 inline semantics:

Build with

git clone -b cc-fixes
cd gcc
hg clone gmp
(cd gmp && aux_dir=. ltdl_dir=. ./.bootstrap)
./configure --disable-multilib --disable-bootstrap --disable-lto --enable-languages=c,c++

Requires disabling CPU identification inline assembly and deprecation warnings.

diff --git a/lib/common/cpu.h b/lib/common/cpu.h
index 5f0923fc..10dd7d7f 100644
--- a/lib/common/cpu.h
+++ b/lib/common/cpu.h
@@ -52,6 +52,7 @@ MEM_STATIC ZSTD_cpuid_t ZSTD_cpuid(void) {
             f7c = (U32)reg[2];
+#elif 1
 #elif defined(__i386__) && defined(__PIC__) && !defined(__clang__) && defined(__GNUC__)
     /* The following block like the normal cpuid branch below, but gcc
      * reserves ebx for use of its pic register so we must specially

Build with


Requires a few changes to avoid wide string literals and including math.h on musl targets.

diff --git a/config.def.h b/config.def.h
index 482901e..bd963ae 100644
--- a/config.def.h
+++ b/config.def.h
@@ -32,7 +32,7 @@ static float chscale = 1.0;
  * More advanced example: L" `'\"()[]{}"
-wchar_t *worddelimiters = L" ";
+wchar_t *worddelimiters = (wchar_t[]){' ', 0};
 /* selection timeouts (in milliseconds) */
 static unsigned int doubleclicktimeout = 300;
diff --git a/x.c b/x.c
index 5828a3b..6e006cc 100644
--- a/x.c
+++ b/x.c
@@ -1,6 +1,5 @@
 /* See LICENSE for license details. */
 #include <errno.h>
-#include <math.h>
 #include <limits.h>
 #include <locale.h>
 #include <signal.h>
@@ -15,6 +14,8 @@
 #include <X11/Xft/Xft.h>
 #include <X11/XKBlib.h>
+float ceilf(float);
 static char *argv0;
 #include "arg.h"
 #include "st.h"

About this wiki

commit 50956c829a0121162bdf3ed7e54335f529c44582
Author: Michael Forney <>
Date:   2020-10-21T15:35:13-07:00

Update qbe submodule
Clone this wiki (read-only) (read/write)