m4 build error on Sequoia

[eschnett (Erik Schnetter)]

Building m4 on Sequoia fails in the configure stage. The relevant lines are

| #include <sys/types.h>
|                    #include <sys/socket.h>
| 
|                    int getpeername (int, void *, unsigned long int *);
| int
| main (void)
| {
| unsigned long int len;
|                   getpeername (0, 0, &len);
|   ;
|   return 0;
| }
configure:58033: error: Cannot find a type to use in place of socklen_t

I believe the reason is the following. The compiler is invoked with

configure:58023: /usr/bin/clang -c -pipe -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk -arch arm64 -I/opt/local/include -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk conftest.c >&5

but the file sys/socket.h is not located in this sysroot. Instead, it is found at /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/sys/socket.h.

[jmroot (Joshua Root)]

Something seems to be wrong with the SDK you have. On my system:

% ls -l /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/sys/socket.h 
-r--r--r--  1 root  wheel  32534 13 Aug 14:03 /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/sys/socket.h

Your machine/endian.h also seems to be including i386/endian.h when building for arm:

configure:17916: /usr/bin/clang -o conftest -pipe -Os -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk -arch arm64 -I/opt/local/include -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk -L/opt/local/lib -Wl,-headerpad_max_install_names -Wl,-syslibroot,/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk -arch arm64 conftest.c  >&5
In file included from conftest.c:155:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/stdlib.h:58:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/_stdlib.h:66:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/sys/wait.h:186:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/machine/endian.h:35:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/i386/endian.h:85:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/sys/_endian.h:131:
In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/libkern/_OSByteOrder.h:62:
/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/libkern/arm/_OSByteOrder.h:50:1: error: redefinition of '_OSSwapInt16'
   50 | _OSSwapInt16(
      | ^
/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/include/libkern/i386/_OSByteOrder.h:50:1: note: previous definition is here
   50 | _OSSwapInt16(
      | ^

[eschnett (Erik Schnetter)]

Indeed I see on my system

uname -m = x86_64

which is wrong (I have an M3 chip). Investigating...

[eschnett (Erik Schnetter)]

It turns out that my terminal emulator, and possibly also my shell, were x86_64 executables running with Rosetta. Maybe this confuses the install scripts? I thought that the default system architecture would still be arm64, but apparently something was off.

Anyway, I'm now using a native terminal emulator and a native shell. All is working fine, and I was able to install m4 without problems.

Thanks for spotting the i386 clue.