cython_aliases: Use ecl-config to determine compiler/linker flags for ecl

[mkoeppe]

We use ecl-config to determine compiler/linker flags for ecl. This is a step towards using a system-installed ecl and is needed/helpful for installing sage in virtual environments (#30371).

$ ecl-config --help
Usage: /usr/local/bin/ecl-config [OPTIONS] [LIBS]
Options: 
	[--cflags]
	[--libs|--ldflags]
Libs:
	cmp

Sample output:

> ./local/bin/ecl-config --cflags --libs
-Dlinux   -I/mnt/d/Programming/sage/local/include
-Wl,--rpath,/mnt/d/Programming/sage/local/lib -L/mnt/d/Programming/sage/local/lib -lecl -Wl,-rpath-link,/mnt/d/Programming/sage/local/lib -L/mnt/d/Programming/sage/local/lib -Wl,-rpath,/mnt/d/Programming/sage/local/lib      -ldl -lm

CC: @dimpase @orlitzky @spaghettisalat @jhpalmieri @tobiasdiez @isuruf @kiwifb @antonio-rojas

Component: build

Keywords: sd111

Author: Tobias Diez, Matthias Koeppe

Branch: 11ad40a

Reviewer: Matthias Koeppe, Dima Pasechnik

Issue created by migration from https://trac.sagemath.org/ticket/30770

[mkoeppe]

comment:2

Ideally, of course, ecl would install a pkg-config module...

[mkoeppe]

comment:3

Hoping we can make progress on this ticket this week - https://wiki.sagemath.org/days111

[mkoeppe]

Changed keywords from none to sd111

[tobiasdiez]

Commit: 3049e53

[tobiasdiez]

Description changed:

--- 
+++ 
@@ -1,3 +1,4 @@
+We use ecl-config to determine compiler/linker flags for ecl. This is a step towards using a system-installed ecl and is needed/helpful for installing sage in virtual environments (#30371).
 
 ```
 $ ecl-config --help
@@ -8,5 +9,12 @@
 Libs:
 	cmp
 ```
+Sample output:
+
+```
+> ./local/bin/ecl-config --cflags --libs
+-Dlinux   -I/mnt/d/Programming/sage/local/include
+-Wl,--rpath,/mnt/d/Programming/sage/local/lib -L/mnt/d/Programming/sage/local/lib -lecl -Wl,-rpath-link,/mnt/d/Programming/sage/local/lib -L/mnt/d/Programming/sage/local/lib -Wl,-rpath,/mnt/d/Programming/sage/local/lib      -ldl -lm
+```
 
 

[tobiasdiez]

Branch: public/build/ecl-config

[tobiasdiez]

Author: Tobias Diez

[tobiasdiez]

comment:6

The following is working for me (in the context of #30371).

---

New commits:

3049e53

Use ecl-config to determine compiler/linker flags for ecl

[mkoeppe]

comment:7

Following the conventions of autoconf, this variable should be called ECL_CONFIG, not ECL_CONFIG_PATH

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

1041128

Rename ecl config variable

[sagetrac-git]

Changed commit from 3049e53 to 1041128

[tobiasdiez]

comment:9

Replying to @mkoeppe:

Following the conventions of autoconf, this variable should be called ECL_CONFIG, not ECL_CONFIG_PATH

I'm not sure if one should follow the autoconf conventions here since the variable is (right now) only used in python scripts, but I've renamed it anyway.

[mkoeppe]

comment:10

capture_output is not available on Python 3.6 - see #30758

[tobiasdiez]

Dependencies: #30551