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* README.git: Describe GCC and GNU make requirements

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* maintMakefile: Put custom C flags into a separate variable
so they can be overridden more easily on the command line.
This commit is contained in:
Paul Smith 2019-09-03 12:24:54 -04:00
parent 5ff6ae6177
commit 76b6e668a6
2 changed files with 14 additions and 2 deletions
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12
README.git
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@ -85,6 +85,8 @@ need to install the following extra software:
* autopoint * autopoint
* pkg-config * pkg-config
* texinfo (for makeinfo) * texinfo (for makeinfo)
* GCC (Clang's GCC emulation is not sufficient)
* GNU make (POSIX make is not sufficient)
And any tools that those utilities require (GNU m4, Perl, etc.) And any tools that those utilities require (GNU m4, Perl, etc.)
@ -93,10 +95,13 @@ a local installation of gnulib you can set GNULIB_SRCDIR to point to it.
Otherwise, ./bootstrap will obtain a clone for you. Otherwise, ./bootstrap will obtain a clone for you.
Unfortunately due to issues with gnulib's getloadavg, you must have automake Unfortunately due to issues with gnulib's getloadavg, you must have automake
1.16.1 or above. This version is not yet widely available in GNU/Linux 1.16.1 or above. This version may not yet be available through GNU/Linux
package managers. If you need to install from source be sure to set package managers. If you need to install from source be sure to set
ACLOCAL_PATH to point to the pkg-config location (e.g., /usr/share/aclocal). ACLOCAL_PATH to point to the pkg-config location (e.g., /usr/share/aclocal).
If you want to build from Git with a non-GCC compiler, add "MAKE_CFLAGS=" to
your make command line (or at least remove any flags your compiler does not
support).
When building from Git you must build in the source directory: "VPATH When building from Git you must build in the source directory: "VPATH
builds" from remote directories are not supported. Once you've created builds" from remote directories are not supported. Once you've created
@ -118,6 +123,11 @@ That is, you can just run:
to build and install GNU make. to build and install GNU make.
NOTE! This method builds GNU make in "maintainer mode". In this mode it will
be slower, possibly MUCH slower: there are various sanity checks
enabled. If you want to build from Git with "maintainer mode" disabled,
add "MAKE_MAINTAINER_MODE=" to your make command line.
Building From Git for Windows Building From Git for Windows
----------------------------- -----------------------------

4
maintMakefile
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@ -29,11 +29,13 @@ MAKEWEBDIR ?= $(SRCROOTDIR)/make/make-web
# We like mondo-warnings! # We like mondo-warnings!
# Also force comments to be preserved. This helps when using ccache, in # Also force comments to be preserved. This helps when using ccache, in
# combination with GCC 7's implicit-fallthrough warning. # combination with GCC 7's implicit-fallthrough warning.
AM_CFLAGS += -C -Wall -Wextra -Werror -Wwrite-strings -Wshadow \ MAKE_CFLAGS := -C -Wall -Wextra -Werror -Wwrite-strings -Wshadow \
-Wdeclaration-after-statement -Wbad-function-cast -Wformat-security \ -Wdeclaration-after-statement -Wbad-function-cast -Wformat-security \
-Wtype-limits -Wunused-but-set-parameter -Wlogical-op -Wpointer-arith \ -Wtype-limits -Wunused-but-set-parameter -Wlogical-op -Wpointer-arith \
-Wignored-qualifiers -Wformat-signedness -Wduplicated-cond -Wignored-qualifiers -Wformat-signedness -Wduplicated-cond
AM_CFLAGS += $(MAKE_CFLAGS)
# Unfortunately the Guile headers are sometimes broken. Convince GCC # Unfortunately the Guile headers are sometimes broken. Convince GCC
# to treat them as system headers so warnings are ignored. # to treat them as system headers so warnings are ignored.
GUILE_CFLAGS := $(patsubst -I%,-isystem %,$(GUILE_CFLAGS)) GUILE_CFLAGS := $(patsubst -I%,-isystem %,$(GUILE_CFLAGS))