<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Feb 7, 2021, at 6:18 PM, Christopher Jones <<a href="mailto:jonesc@hep.phy.cam.ac.uk" class="">jonesc@hep.phy.cam.ac.uk</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta http-equiv="Content-Type" content="text/html; charset=utf-8" class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><br class=""></div>what happens if you set SDKROOT and then try again<div class=""><br class=""></div><div class="">export SDKROOT=`xcrun --show-sdk-path`</div><div class=""><br class=""></div><div class="">?</div><div class=""><br class=""></div></div></div></blockquote><div><br class=""></div><div><br class=""></div><div><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">Hm… that seems to have done the trick.</span><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">So, what changed between upgrades to gcc9…? </div><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class="">It worked fine before.</div><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0);" class=""><br class=""></div></div><br class=""><blockquote type="cite" class=""><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><div class=""><blockquote type="cite" class=""><div class="">On 7 Feb 2021, at 11:12 pm, Carlo Tambuatco <<a href="mailto:oraclmaster@gmail.com" class="">oraclmaster@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><br class="Apple-interchange-newline"><br class="" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><blockquote type="cite" class="" style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;"><div class="">On Feb 7, 2021, at 5:39 PM, Christopher Jones <<a href="mailto:jonesc@hep.phy.cam.ac.uk" class="">jonesc@hep.phy.cam.ac.uk</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">macOS 11 brought big changes to how Apple versions its SDKs. They now potentially change each minor update, and as such we had to figure out how to deal with this.<div class=""><br class=""></div><div class="">gcc is built against a specific SDK, and to handle this unpredictably it was recently changed to use the unversioned SDK, instead of a versioned one, where required.</div><div class=""><br class=""></div><div class=""><a href="https://github.com/macports/macports-ports/commit/e8866c5019d60832527850b4e50fdc1de8878716#diff-5aeb3e82f6999f57229a816d2877a6232489c3484ac3e6716cb7e62b5a82696f" class="">https://github.com/macports/macports-ports/commit/e8866c5019d60832527850b4e50fdc1de8878716#diff-5aeb3e82f6999f57229a816d2877a6232489c3484ac3e6716cb7e62b5a82696f</a></div><div class=""><br class=""></div><div class="">Are you on maOS 11 ?</div><div class=""><br class=""></div><div class="">please post the output you get from your failing build, showing the full command line you use, and the full output, and include the -v option to get additional diagnostic output.</div><div class=""><br class=""></div><div class="">Chris</div></div></div></blockquote><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Using macOS Catalina 10.15.7</div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class="">Here’s my CPATH environment variable, which up until the gcc9 upgrade, worked fine to relay the location of </div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">relevant include paths: <br class=""><br class="">CPATH=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include:/usr/local/include:/opt/local/include:/usr/local/dart-sdk/include:/Library/Frameworks/R.framework/Resources/include</div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Also, here’s the contents of my SDKs directory in XCode 12.4: </div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">pwd = /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs</div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">drwxr-xr-x 5 root wheel 160 Nov 30 07:27 DriverKit20.2.sdk/<br class="">drwxr-xr-x 7 root wheel 224 Nov 30 07:27 MacOSX.sdk/<br class="">lrwxr-xr-x 1 root wheel 10 Jan 27 04:53 MacOSX11.1.sdk -> MacOSX.sdk/</div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">So it seems I’m using the SDK for macOS 11.1…</div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">Here’s the full output of the error using the -v option:</div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class="">g++ -v -std=c++11 -c E2.5.2.cpp -o E2.5.2.o<br class="">Using built-in specs.<br class="">COLLECT_GCC=g++<br class="">Target: x86_64-apple-darwin19<br class="">Configured with: /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_gcc9/gcc9/work/gcc-9.3.0/configure --prefix=/opt/local --build=x86_64-apple-darwin19 --enable-languages=c,c++,objc,obj-c++,lto,fortran,jit --libdir=/opt/local/lib/gcc9 --includedir=/opt/local/include/gcc9 --infodir=/opt/local/share/info --mandir=/opt/local/share/man --datarootdir=/opt/local/share/gcc-9 --with-local-prefix=/opt/local --with-system-zlib --disable-nls --program-suffix=-mp-9 --with-gxx-include-dir=/opt/local/include/gcc9/c++/ --with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local --with-isl=/opt/local --enable-stage1-checking --disable-multilib --enable-lto --enable-libstdcxx-time --with-build-config=bootstrap-debug --with-as=/opt/local/bin/as --with-ld=/opt/local/bin/ld --with-ar=/opt/local/bin/ar --with-bugurl=<a href="https://trac.macports.org/newticket" class="">https://trac.macports.org/newticket</a><span class="Apple-converted-space"> </span>--enable-host-shared --disable-tls --with-pkgversion='MacPorts gcc9 9.3.0_5' --with-sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk<br class="">Thread model: posix<br class="">gcc version 9.3.0 (MacPorts gcc9 9.3.0_5) <br class="">COLLECT_GCC_OPTIONS='-v' '-std=c++11' '-c' '-o' 'E2.5.2.o' '-mmacosx-version-min=10.15.0' '-asm_macosx_version_min=10.15' '-shared-libgcc' '-mtune=core2'<br class=""> /opt/local/libexec/gcc/x86_64-apple-darwin19/9.3.0/cc1plus -quiet -v -D__DYNAMIC__ E2.5.2.cpp -fPIC -quiet -dumpbase E2.5.2.cpp -mmacosx-version-min=10.15.0 -mtune=core2 -auxbase-strip E2.5.2.o -std=c++11 -version -o /var/folders/yh/ywbbh6_w8xl9_6006s6dywd80000gr/T//cc1Ruczn.s<br class="">GNU C++11 (MacPorts gcc9 9.3.0_5) version 9.3.0 (x86_64-apple-darwin19)<br class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>compiled by GNU C version 9.3.0, GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version isl-0.22.1-GMP<br class=""><br class="">GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072<br class="">ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/opt/local/include"<br class="">ignoring nonexistent directory "/opt/local/lib/gcc9/gcc/x86_64-apple-darwin19/9.3.0/../../../../../x86_64-apple-darwin19/include"<br class="">ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/include"<br class="">ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/System/Library/Frameworks"<br class="">ignoring nonexistent directory "/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/Library/Frameworks"<br class="">#include "..." search starts here:<br class="">#include <...> search starts here:<br class=""> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include<br class=""> /usr/local/include<br class=""> /opt/local/include<br class=""> /usr/local/dart-sdk/include<br class=""> /Library/Frameworks/R.framework/Resources/include<br class=""> /opt/local/include/gcc9/c++/<br class=""> /opt/local/include/gcc9/c++//x86_64-apple-darwin19<br class=""> /opt/local/include/gcc9/c++//backward<br class=""> /opt/local/lib/gcc9/gcc/x86_64-apple-darwin19/9.3.0/include<br class=""> /opt/local/lib/gcc9/gcc/x86_64-apple-darwin19/9.3.0/include-fixed<br class="">End of search list.<br class="">GNU C++11 (MacPorts gcc9 9.3.0_5) version 9.3.0 (x86_64-apple-darwin19)<br class=""><span class="Apple-tab-span" style="white-space: pre;"> </span>compiled by GNU C version 9.3.0, GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version isl-0.22.1-GMP<br class=""><br class="">GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072<br class="">Compiler executable checksum: 45101e0fe9cd9377caa0fee122dd387a<br class="">In file included from /opt/local/include/gcc9/c++/ext/string_conversions.h:41,<br class=""> from /opt/local/include/gcc9/c++/bits/basic_string.h:6493,<br class=""> from /opt/local/include/gcc9/c++/string:55,<br class=""> from /opt/local/include/gcc9/c++/bits/locale_classes.h:40,<br class=""> from /opt/local/include/gcc9/c++/bits/ios_base.h:41,<br class=""> from /opt/local/include/gcc9/c++/ios:42,<br class=""> from /opt/local/include/gcc9/c++/ostream:38,<br class=""> from /opt/local/include/gcc9/c++/iostream:39,<br class=""> from ../../standard_includes.h:1,<br class=""> from E2.5.2.cpp:1:<br class="">/opt/local/include/gcc9/c++/cstdlib:75:15: fatal error: stdlib.h: No such file or directory<br class=""> 75 | #include_next <stdlib.h><br class=""> | ^~~~~~~~~~<br class="">compilation terminated.<br class="">make: *** [../../Makefile-Template:10: E2.5.2.o] Error 1</div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><div style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><br class=""></div><br class="" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><blockquote type="cite" class="" style="font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; text-decoration: none;"><div class=""><div class="" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class="">On 7 Feb 2021, at 10:24 pm, Carlo Tambuatco <<a href="mailto:oraclmaster@gmail.com" class="">oraclmaster@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="auto" class="">Well what's odd is I'm only getting this error after upgrading to the latest macports gcc9. Indeed when I use the XCode provided clang version of gcc, it finds all the required libraries. My CPATH environment variable was sufficient to specify the locations of the libraries before the upgrade, so the question is, what changed post-upgrade?</div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Feb 7, 2021, 5:03 PM Chris Jones <<a href="mailto:jonesc@hep.phy.cam.ac.uk" class="">jonesc@hep.phy.cam.ac.uk</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><br class="">It sounds like your builds are not correctly specifying the SDK gcc is to use. There are a number of ways you can do this, either by pass it via a compiler flag, by running the complication through xcrun, or by setting the SDKROOT variables to the required path.<br class=""><br class="">Cheers Chris<br class=""><br class="">> On 7 Feb 2021, at 9:25 pm, Carlo Tambuatco <<a href="mailto:oraclmaster@gmail.com" target="_blank" rel="noreferrer" class="">oraclmaster@gmail.com</a>> wrote:<br class="">><span class="Apple-converted-space"> </span><br class="">> I don’t know if this is a result of updating to the latest macports gcc9, or the update of XCode, but<span class="Apple-converted-space"> </span><br class="">> all of a sudden when I try to build my C++ program which includes <cstdio> I get this strange<span class="Apple-converted-space"> </span><br class="">> chain reaction of errors.<br class="">><span class="Apple-converted-space"> </span><br class="">> In file included from /opt/local/include/gcc9/c++/ext/string_conversions.h:41,<br class="">> from /opt/local/include/gcc9/c++/bits/basic_string.h:6493,<br class="">> from /opt/local/include/gcc9/c++/string:55,<br class="">> from /opt/local/include/gcc9/c++/bits/locale_classes.h:40,<br class="">> from /opt/local/include/gcc9/c++/bits/ios_base.h:41,<br class="">> from /opt/local/include/gcc9/c++/ios:42,<br class="">> from /opt/local/include/gcc9/c++/ostream:38,<br class="">> from /opt/local/include/gcc9/c++/iostream:39,<br class="">> from ../../standard_includes.h:1,<br class="">> from E2.5.2.cpp:1:<br class="">> /opt/local/include/gcc9/c++/cstdlib:75:15: fatal error: stdlib.h: No such file or directory<br class="">> 75 | #include_next <stdlib.h><br class="">><span class="Apple-converted-space"> </span><br class="">><span class="Apple-converted-space"> </span><br class="">> From my makefile this seems to be the offending includes statement:<br class="">><span class="Apple-converted-space"> </span><br class="">> #include <iostream><br class="">> #include <cstdio><br class="">><span class="Apple-converted-space"> </span><br class="">><span class="Apple-converted-space"> </span><br class="">> I’ve googled and it seems that it can’t find stdlib.h, even though it is on my CPATH environment variable:<br class="">><span class="Apple-converted-space"> </span><br class="">> export CPATH=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include:/usr/local/include:/opt/local/include:/usr/local/dart-sdk/include:/Library/Frameworks/R.framework/Resources/include<br class="">><span class="Apple-converted-space"> </span></blockquote></div></div></blockquote></div></div></div></div></blockquote></div></blockquote></div><br class=""></div></div></div></blockquote></div><br class=""></div></body></html>