I don't know what is causing the error, but here are a few work arounds: 1. You may try configure with --with-device=ch3. It uses an older device that is in maintenance mode, but likely it will work for you. 2. Try install libfabric separately and configure mpich with --with-libfabric=prefix 3. You may try brew install libfabric or brew install mpich. -- Hui ________________________________ From: Douglas G Dommermuth via discuss <[email protected]> Sent: Friday, March 1, 2024 6:09 PM To: [email protected] <[email protected]> Cc: Douglas G Dommermuth <[email protected]> Subject: [mpich-discuss] Install errors on MAC OS Sonoma: "error: expected declaration specifiers or ‘...’ before string constant" I am compiling mpich 4. 2. 0 on a MacBook Air Apple M1 running macOS Sonoma 14. 3. 1. I am using gcc and gfortran versions 13. 2. 0. I get the following errors when I build MPICH: /Applications/Xcode. app/Contents/Developer/usr/bin/make all-am depbase=`echo ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message came from outside your organization. ZjQcmQRYFpfptBannerEnd I am compiling mpich 4.2.0 on a MacBook Air Apple M1 running macOS Sonoma 14.3.1. I am using gcc and gfortran versions 13.2.0. I get the following errors when I build MPICH: /Applications/Xcode.app/Contents/Developer/usr/bin/make all-am depbase=`echo util/info.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\ gcc -DHAVE_CONFIG_H -I. -I./include -D_GNU_SOURCE -D__USE_XOPEN2K8 -DSYSCONFDIR=\"/Users/douglasdommermuth/mpich2/mpich2-install/etc\" -DRDMADIR=\"@rdmadir@\" -DPROVDLDIR=\"/Users/douglasdommermuth/mpich2/mpich2-install/lib/libfabric\" -I./prov/sockets/include -I./prov/sockets -Wall -O2 -DNDEBUG -MT util/info.o -MD -MP -MF $depbase.Tpo -c -o util/info.o util/info.c &&\ mv -f $depbase.Tpo $depbase.Po In file included from ./include/osx/osd.h:182, from ./include/ofi_osd.h:60, from util/info.c:38: /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/os/lock.h:114:33: error: expected declaration specifiers or ‘...’ before string constant 114 | OS_SWIFT_UNAVAILABLE_FROM_ASYNC("Use OSAllocatedUnfairLock.performWhileLocked() for async-safe scoped locking") | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/os/lock.h:140:33: error: expected declaration specifiers or ‘...’ before string constant 140 | OS_SWIFT_UNAVAILABLE_FROM_ASYNC("Use OSAllocatedUnfairLock.tryPerformWhileLocked() for async-safe scoped locking") | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/os/lock.h:154:33: error: expected declaration specifiers or ‘...’ before string constant 154 | OS_SWIFT_UNAVAILABLE_FROM_ASYNC("Use OSAllocatedUnfairLock.performWhileLocked() for async-safe scoped locking") | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ./include/osx/osd.h: In function ‘pthread_spin_lock’: ./include/osx/osd.h:194:9: warning: implicit declaration of function ‘os_unfair_lock_lock’ [-Wimplicit-function-declaration] 194 | os_unfair_lock_lock(lock); | ^~~~~~~~~~~~~~~~~~~ ./include/osx/osd.h: In function ‘pthread_spin_unlock’: ./include/osx/osd.h:200:9: warning: implicit declaration of function ‘os_unfair_lock_unlock’ [-Wimplicit-function-declaration] 200 | os_unfair_lock_unlock(lock); | ^~~~~~~~~~~~~~~~~~~~~ ./include/osx/osd.h: In function ‘pthread_spin_trylock’: ./include/osx/osd.h:206:16: warning: implicit declaration of function ‘os_unfair_lock_trylock’ [-Wimplicit-function-declaration] 206 | return os_unfair_lock_trylock(lock) ? 0 : EBUSY; | ^~~~~~~~~~~~~~~~~~~~~~ make[3]: *** [util/info.o] Error 1 make[2]: *** [all] Error 2 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 It looks like errors in macOS’s command line tools. I don’t know how to circumvent the problem. Various text and log files are attached in mpich2.tar.gz. A copy of the lock.h code is also included in the zip file. Thank you, Doug.